http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
General fertilizer recommendations for the High Plains
Developed by personnel of the Departments of Agronomy and Horticulture, College Station and Substation no. 8, Lubbock, USDA Southwestern Great Plains Field Station, Bushland of the Texas A. & M. College System.
The United States Department of Agriculture cooperating.
Leaflet (Texas Agricultural Extension Service) ; 226 [1960-61]