Knobil, Katharine: Progesterone, Cortisol, and Estradiol Levels During Late Pregnancy in the Plasma of Ovariectomized, Medroxyprogesterone Acetate (MPA) Treated Cows, 1986, Box: 4. Cornell University Office of Undergraduate Biology honors theses, 53-2-4432. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/919584 Accessed August 30, 2026.