P-ISSN 0008-0845
E-ISSN 2160-8091
Vol. 22, Issue 12, 1968December 01, 1968 PDT 
ccby-nc-nd-4.0 
Manure management— costs and product forms 
Manure management— costs and product forms
J Van Dam, C Perry, 
Van Dam, J, and C Perry. 1968. “Manure Management— Costs and Product Forms.” California Agriculture 22 (12): 12–13.