Validity of the survey method of research
By: by W.J. Spillman
Series: Bulletin / United States Department of Agriculture -- no. 529; Bulletin of the U.S. Department of Agriculture -- no. 529.
Publisher: U.S. Dept. of Agriculture
Published: 1917
Place of publication: Washington, D.C
Language: eng
Number of pages: 15
Subjects: Agricultural surveys; Farm management
Notes: Caption title.

"April 5, 1917."

"Professional paper."