Schroeder, E.C. and John R. Mohler. "The tuberculin test of hogs and some methods of their infection with tuberculosis." United States Department of Agriculture, Bureau of Animal Industry, Bulletin No. 88, 1906.

Schroeder, E.C. and John R. Mohler. "The tuberculin test of hogs and some methods of their infection with tuberculosis." United States Department of Agriculture, Bureau of Animal Industry, Bulletin No. 88, 1906., Box: 4. Veterinary Reprint and Pamphlet Collection, 24-4-3369. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/263192 Accessed December 20, 2025.