DNA CONTENT OF SPERMATOZOA IN FERTILE AND INFERTILE BULLS, AND ERRORS IN ITS DETERMINATION M.-F. KRAMER, Ankie WILLEMSEN and Rosalie JANSSENAnn. Biol. anim. Bioch. Biophys., 8 2 (1968) 217-224DOI: https://doi.org/10.1051/rnd:19680204