32 LIMNOLOGY, WATER SUPPLY AND WASTE DISPOSAL 



Strong, R. P. 1944. In Sttit's Diagnosis, Prevention, and Treatment of Tropical Diseases. 

 7th Edition, Blakiston, Philadelphia. 



Walker, E. L. and Sellards, A. W. 1913. Experimental entamoebic dysentery. Philip- 

 pine Jour. Sci. (B), 8: 253. 



Wenyon, C. M. 1926. In Protozoology. William Wood, New York. 



. 1947. Discussion on amoebiasis. Roy. Soc. Trop. Med. and Hyg. Trans., 



41: 55. 



Wenyon, C. M. and O'Conneb, F. W. 1917. In Human Intestinal Protozoa in Near 

 East. London. 



Westphal, a. 1937. Betrachtungen und experimentelle Untersuchungen zur Wirulenz 

 der Entamoeba histolytica beim Menschen. Arch. j. Schiffs u. Tropen. Hyg., 41 : 262. 



