 | Animal waste. | (2) |
 |
 | Economic implications of water pollution abatement in family farm livestock production / by Roy N. Van Arsdall and James B. Johnson. Van Arsdall, Roy Neuman, 1924- 2n Washington, D.C. : U.S. Dept. of Agriculture, Economic Research Service, 1972. | |
| Partial drying of poultry manure using in-house air / . Oheimb, Rainer A. von. : West Virginia University Agricultural Experiment Station, 1974. | |
|