http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Fertilizer recommendations for the Rio Grande Plain
M. K. Thornton, Extension Agricultural Chemist, Bruce Perry, superintendent, substation no. 19, R. A. Hall, superintendent, substation no. 1, Texas A. & M. College System.
The United States Department of Agriculture cooperating.
"Adapted from Texas Agricultural Experiment Station bulletin 431, by W. T. Carter."
Leaflet (Texas Agricultural Extension Service) ; 227 [1956]