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Need-to-know information on the classification and identificationof aquatic invertebrates This Fourth Edition of the standard reference used by generationsof professionals and students is the source for authoritativeinformation on the natural history, ecology, and taxonomy offree-living American freshwater invertebrates. Completely revisedand updated, this professional field guide features a wealth of newknowledge on invertebrate animal phyla covered in the previousedition as well as fully modified sections on the preparation ofmaterials. Other important features of Pennak's Freshwater Invertebrates ofthe United States, Fourth Edition include: * Current taxonomical arrangements of all freshw...
Since 1996, The Hudson has been an essential guide to the full sweep of the great river's natural history and human heritage. This updated third edition includes the latest information about the ongoing fight against pollution, plus vibrant new full-color illustrations showing the plants and wildlife that make this ecosystem so special.
Announcements for the following year included in some vols.
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