General Nature in 1980

An Illustrated Guide to Benthic Marine Algae of Coastal North Carolina: Vol. 1: Rhodophyta by Kapraun, Donald F.

National Audubon Society Field Guide to North American Trees: Eastern Region by National Audubon Society

Streams and Rivers of Minnesota by Waters, Thomas

Geological Nomenclature by

National Audubon Society Field Guide to Insects and Spiders: North America by National Audubon Society

Plants of Quetico and the Ontario Shield by Walshe, Shan