Calendar of the letters of Charles Robert Darwin to Asa Gray.
By: With an introduction by Bert James Loewenberg, assistant professor of history, Univesity of South Dakota.  Prepared by the Historical records survey, Division of professional and service projects, Work projects administration.
Contributors: Darwin, Charles, 1809-1882; Gray, Asa, 1810-1888.; Loewenberg, Bert James, 1905-
Publisher: The Historical records survey
Published: 1939
Place of publication: Boston, Mass
Language: eng
Number of pages: 148
Subjects: Manuscripts -- United States
Notes: "Publications of the Historical records survey in Massachusetts": p. 148.
Reproduced from typewritten copy.
"Biographical notes": p. [97]-106.