Rydberg, P. A. (1932). Flora of the prairies plains of Central-North America. New York: Botanical Garden.
Chicago Style CitationRydberg, Pier Axel. Flora of the Prairies Plains of Central-North America. New York: Botanical Garden, 1932.
MLA CitationRydberg, Pier Axel. Flora of the Prairies Plains of Central-North America. New York: Botanical Garden, 1932.
Warning: These citations may not always be 100% accurate.