References 423 



Witton, C. J. Microbiology WitJi Applications to Nursings McGraw- 

 Hill Book Company, Inc., New York, New York, 1950. 



Winslow, C.-E. A. The Conquest of Epidemic Disease, Princeton Uni- 

 versity Press, Princeton, New Jersey, 1944. 



Zinsser, H. Rats, Lice and History, Blue Ribbon Books, New York, 



New York, 1935. 

 Zinsser, H., and Bayne-Jones, S. A Textbook of Bacteriology, D. Apple- 



ton-Century Company, Inc., New York, New York, 1939. 

 Zworykin, V. K., and Hillier, J. "Electron microscopy," Scientific 



Monthly, 1944, 59, 165-179.' 



