 A Field Guide to Reptiles & Amphibians of Eastern & Central North America (Peterson Field Guide Series) Author: Roger Conant Manufacturer: Houghton Mifflin ListPrice: $21.00 Offer: $14.28
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 A Field Guide to Freshwater Fishes : North America North of Mexico (Peterson Field Guides) Author: Brooks M. Burr Manufacturer: Houghton Mifflin ListPrice: $19.00 Offer: $12.92
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 A Field Guide to Insects Manufacturer: Houghton Mifflin ListPrice: $19.00 Offer: $12.92
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 An Introduction to the Aquatic Insects of North America Author: Richard W. Merritt Manufacturer: Kendall Hunt Pub Co ListPrice: $124.95 Offer: $121.83
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 Stream Ecology: Structure and function of running waters Author: J. David Allan Manufacturer: Springer ListPrice: $89.95 Offer: $71.97
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 Newcomb's Wildflower Guide Author: Lawrence Newcomb Manufacturer: Little, Brown and Company ListPrice: $19.99 Offer: $13.59
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 Freshwater Ecology: Concepts & Environmental Applications (Aquatic Ecology) Author: Walter K. Dodds Manufacturer: Academic Press ListPrice: $96.95 Offer: $77.56
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 Methods in Stream Ecology, Second Edition Author: Richard Hauer Manufacturer: Academic Press ListPrice: $49.95 Offer: $44.95
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 Pond Life: Revised and Updated (A Golden Guide from St. Martin's Press) Author: George K. Reid Manufacturer: Golden Guides from St. Martin's Press ListPrice: $6.95 Offer: $6.95
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 Pennak's Freshwater Invertebrates of the United States: Porifera to Crustacea, 4th Edition Author: Douglas Grant Smith Manufacturer: Wiley ListPrice: $160.00 Offer: $128.00
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 Caterpillars of Eastern North America: A Guide to Identification and Natural History (Princeton Field Guides) Author: David L. Wagner Manufacturer: Princeton University Press ListPrice: $29.95 Offer: $19.77
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 Freshwater Macroinvertebrates of Northeastern North America Author: Barbara L. Peckarsky Manufacturer: Comstock Publishing ListPrice: $39.95 Offer: $32.54
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 Streams: Their Ecology and Life Author: Colbert E. Cushing Manufacturer: Academic Press ListPrice: $71.95 Offer: $71.95
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 Guide to Aquatic Insects And Crustaceans Author: Kami Watson-ferguson Manufacturer: Stackpole Books ListPrice: $7.95 Offer: $7.95
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 Stream Ecology: Structure and Function of Running Waters Author: J.D. Allan Manufacturer: Springer ListPrice: $89.95 Offer: $71.97
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 Field Guide To Grasshoppers, Katydids, And Crickets Of The United States Author: John L. Capinera Manufacturer: Cornell University Press ListPrice: $29.95 Offer: $19.77
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 Vernal Pools: Natural History and Conservation Author: Elizabeth A., Ph.D. Colburn Manufacturer: McDonald and Woodward Publishing Company ListPrice: $44.95 Offer: $44.95
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 Vernal Pools: Natural History and Conservation Author: Elizabeth A., Ph.D. Colburn Manufacturer: McDonald and Woodward Publishing Company ListPrice: $34.95 Offer: $26.56
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 Ecology and Classification of North American Freshwater Invertebrates Author: James H. Thorp Manufacturer: Academic Press ListPrice: $113.00 Offer: $90.25
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 Aquatic Entomology: The Fishermen's Guide and Ecologists' Illustrated Guide to Insects and Their Relatives (Crosscurrents) Author: W. Patrick McCafferty Manufacturer: Jones and Bartlett Publishers, Inc. ListPrice: $106.95 Offer: $74.87
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 An Introduction to the Aquatic Insects of North America Manufacturer: Kendall/Hunt Publishing Company ListPrice: $87.95
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 Pond and Brook: A Guide to Nature in Freshwater Environments Author: Michael J. Caduto Manufacturer: UPNE ListPrice: $25.95 Offer: $23.35
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 Wild Solutions: How Biodiversity is Money in the Bank Author: Andrew Beattie Manufacturer: Yale University Press ListPrice: $25.95 Offer: $25.95
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 Methods in Stream Ecology Manufacturer: Academic Press ListPrice: $52.95
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 A Handbook for Stream Enhancement & Stewardship Author: Izaak Walton League of America Manufacturer: McDonald and Woodward Publishing Company ListPrice: $34.95 Offer: $34.95
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Wild Solutions: How Biodiversity is Money in the Bank, Second Edition Author: Andrew Beattie Manufacturer: Yale University Press ListPrice: $18.50 Offer: $18.50
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