Expt. Station Extension Service Manual 44. 69. Ede, Leslie L. and R. L. Branson. 1973. Palo Verde Valley Manures, Their Chemical Composition and Fertilizer Value. Agric. Extension, University of California, Riverside County. December. 70 .
|Title||:||Manure harvesting practices|
|Author||:||Ralph W. Hansen, United States. Environmental Protection Agency. Office of Research and Development, Colorado State University|