Some natural violet hybrids of North America
Series: Vermont. Agricultural experiment station. Bulletin -- no. 239. July, 1924; Bulletin (Vermont Agricultural Experiment Station) -- no. 239. July, 1924.
Publisher: Free Press Print. Co.
Published: 1924
Place of publication: Burlington
Language: eng
Number of pages: 205
Subjects: Violets; Plant hybridization
Notes: Introduction by G.P. Burns.

At head of title: University of Vermont and State Agricultural College.