Why fruit trees fail to bear
By: [by H.P. Gould]
Series: United States. Dept. of Agriculture. Leaflet -- no. 172; Leaflet (United States. Dept. of Agriculture) -- no. 172.
Publisher: U.S. Dept. of Agriculture
Published: 1939
Place of publication: Washington, D.C
Language: eng
Subjects: Fruit trees; Effect of temperature on; Sterility in plants
Notes: Cover title.

"Issued February 1939"--P. 1.