304 HADlVnoX UIDI.OOY 



W oilman, E., F. Ilolwock, iind S. I.uria (li>40) KlTcct of radiations on bacteriophage 

 ri6. Nature, 145: 1)35 «>:i(i. 



Wolliiian, 10., anil A. Lai-assanno (liMO) Evaluation des dimensions des bacterio- 

 phages an moyen des rayons X. Ann. inst. Pasteur, 64: 5-39. 



Ziegler, J. E., Jr., (!. I. Lavin, and F. L. Horsfall, Jr. (1944) Interforcnce between 

 the inlluciiza viriises. II. The effect of virus rendered non-infective by ultra- 

 vioU't r.uliatioii upon the mult ii)licat ion of iiiHuenza viru.ses in the chick embryo. 

 J. Exptl. Med., 79: 379-400. 



Manuscript received hii thr ((lilnr Apr. 20, 1951 



