National Wildlife Federation Field Guide to Trees of North America
Bruce Kershner, Daniel Mathews, Gil Nelson, Richard Spellenberg, Craig Tufts, John W. Thieret, Terry Purinton, Andrew Block, Gerry Moore
National Wildlife Federation Field Guide to Wildflowers of North America
David M. Brandenburg, Craig Tufts
National Wildlife Federation Field Guide to Insects and Spiders & Related Species of North America
Arthur V. Evans, Craig Tufts
National Wildlife Federation Field Guide to Birds of North America
Edward S. Brinkley, Craig Tufts