00298nam a2200097Ia 4500008004100000040001100041100001600052245004100068260007800109300001300187251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aPeyton Rous 4aThe Journal of Experimental Medicine  c1954bThe American Association for the Advancement of ScienceaWashington  aP. 1-432