The American species of Crepis
Subtitle: their interrelationships and distribution as affected by polyploidy and apomixis
By: [by] E. B. Babcock [and] G. L. Stebbins, Jr.
Contributors: Stebbins, G. Ledyard 1906-
Series: [Carnegie Institution of Washington. Publication no. 504]; Carnegie Institution of Washington publication -- 504.
Publisher: Carnegie Institution of Washington
Published: 1938
Place of publication: Washington, D.C
Language: eng
Number of pages: 199
Subjects: Crepis.
Notes: "First issued December 6, 1938."

"Literature cited": p. 75-78.