Studies on the mouse mammary tumor agent; the neutralization of the agent by placenta.
D000818:Animals; D001943:Breast Neoplasms; D005260:Female; D006801:Humans; D015674:Mammary Neoplasms, Animal; D051379:Mice; D009369:Neoplasms; D009374:Neoplasms, Experimental; D010920:Placenta; D011247:Pregnancy
TUMORS/experimental