00761cam a22002292 4500 agr59000115 DLC 20260227111019.0 821020s1959 dcua 000 0 eng agr59000115 DLC CarP DLC S21 .A6 rev. 1787, Apr. 1959 United States. Agricultural Research Service. Animal Disease and Parasite Research Division. Internal parasites of swine. Rev. Washington, 1959. ii, 42 p. illus. 23 cm. Swine Parasites. Helminths. Schwartz, Benjamin, 1889- Internal parasites of swine. United States. Department of Agriculture. Farmers' bulletin no. 1787. 11667 11667