Supplement to History of Hog Cholera Research in the U.S. Department of Agriculture: Research Work on Hog Cholera as Reported in the Annual Reports of the Chiefs of the Former Bureau of Animal Industry, 1903-53
Supplement to History of Hog Cholera Research in the U.S. Department of Agriculture: Research Work on Hog Cholera as Reported in the Annual Reports of the Chiefs of the Former Bureau of Animal Industry, 1903-53
