Variation in the chemical composition of soils
By: by W.O. Robinson, L.A. Steinkoenig and William H. Fry
Contributors: Steinkoenig, L. A. (Louis Adrian), 1885-; Fry, William H. (William Henry), 1888-1932
Series: Bulletin / United States Department of Agriculture -- no. 551; Bulletin of the U.S. Department of Agriculture -- no. 551.
Publisher: U.S. Dept. of Agriculture
Published: 1917
Place of publication: Washington, D.C
Language: eng
Number of pages: 16
Subjects: Soils; Composition
Notes: Caption title.

"June 26, 1917."