Savage, A., W.W. Williams and N.M. Fowler. "A Statistical Study of the head length variability of bovine spermatazoa and its application to the determination of fertility." From the Transactions of the Royal Society of Canada, 1927.

Savage, A., W.W. Williams and N.M. Fowler. "A Statistical Study of the head length variability of bovine spermatazoa and its application to the determination of fertility." From the Transactions of the Royal Society of Canada, 1927., 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/263181 Accessed December 22, 2025.