Fieldbook of Illinois wild flowers :
six hundred fifty of the more common flowering plantsin the state.
APA Citation
Illinois. Natural History Survey Division. (1936). Fieldbook of Illinois wild flowers: six hundred fifty of the more common flowering plantsin the state. Urbana, Ill..
MLA Citation
Illinois. Natural History Survey Division. Fieldbook of Illinois Wild Flowers: Six Hundred Fifty of the More Common Flowering Plantsin the State. Urbana, Ill., 1936.
Warning: These citations may not always be complete (especially for serials).