|Author:||Jacob, K. D.|
|Title:||The Composition and Distribution of Phosphate Rock With Special Reference to the United States.|
|Publication info:||Beltsville, MD: U.S. Department of Agriculture, National Agricultural Library, Alternative Farming Systems Information Center
|Rights/Permissions:||Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S.|
The Composition and Distribution of Phosphate Rock With Special Reference to the United States.
Jacob, K. D.
Washington DC: : United States Department of Agriculture, June 1933
Phosphate rock United States
J500 Soil Fertility, Fertilizers, and Manures