Twenty-two years of tuberculin testing in the same herd
Dahlberg, A.C.
Twenty-two years of tuberculin testing in the same herd - Geneva 1923 - 1-8 p. - Tuberculin New York Agricultural Experiment Station. Bulletin No. 496 .
Twenty-two years of tuberculin testing in the same herd - Geneva 1923 - 1-8 p. - Tuberculin New York Agricultural Experiment Station. Bulletin No. 496 .