 | Swine Parasites. | (2) |
 |
 | Preventing and controlling internal parasites of hogs / . Washington, D.C. : U.S. Dept. of Agriculture, 1970. | |
 | Preventing and controlling internal parasites of hogs / Animal Disease and Parasite Research Division, Agricultural Research Service. Washington, D.C. : U.S. Dept. of Agriculture, 1969. | |
|