A modified boerner sampler
By: by E.G. Boerner and E.H. Ropes
Contributors: Ropes, Elihu Harrison, 1876-
Series: Bulletin / United States Department of Agriculture -- no. 857; Bulletin of the U.S. Department of Agriculture -- no. 857.
Publisher: U.S. Dept. of Agriculture
Published: 1920
Place of publication: Washington, D.C
Language: eng
Subjects: Grain; Sampling; Equipment and supplies; Grading
Notes: Caption title.

"June 25, 1920."

"Professional paper."