A field guide to wildflowers : Northeastern and North- central North America - Peterson, Roger Tory, 1908-; McKenny, Margaret; National Audubon Society; National Wildlife Federation; Roger Tory Peterson Institute (Boston : Houghton Mifflin, 1968)
Title on cover: Wildflowers : Northeastern/North central North America., card
Title on added t.p.: A field guide to wildflowers of Northeastern and North-central North America.
"Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute."
Includes index.
Keywords: Wild flowers -- United States -- Identification