insider.si.edu

Key to the families of North American insects; an introduction to the classification of ...

KEY TO THE FAMILIES OF NORTH AMERICAN INSECTS AN INTRODUCTION TO THE CLASSIFICATION OF INSECTS BY CHARLES T BRUES AND AL MELANDER ...
insider.si.edu

Ecology and classification of North American freshwater invertebrates / edited by James H ...

Introduction to freshwater invertebrates / James H. Thorp and Alan P. Covich -- An overview of freshwater habitats / James H. Thorp and Alan P. Covich -- Protozoa / William D. Taylor and Robert W.