A field guide to wildflowers of Northeastern and North-Central North America
Subtitle: a visual approach arranged by color, for and detail
By: by Roger Rory Peterson and Margaret McKenny.  Illus. by Roger Tory Peterson.
Contributors: McKenny, Margaret.
Series: The Peterson field guide series -- no.17.
Publisher: Houghton Mifflin
Published: 1968
Place of publication: Boston
Number of pages: 420
Subjects: Wild flowers -- United States -- Pictorial works
Genres: Pictorial works