r 
Mote: Similar letters should be written to 
‘ _Dr. J. Jadin 
MSdecine-Directeur 
du Laboratoire Medical 
Bukayu, Congo- Beige 
Dr. Maurice Leoorate 
Director, IMEAC 
Yangambi, Belgian Congo 
Dr, Louis van den '3erg 
Director, I1?SAG 
Uvira, Belgian Congo 
* 
«« 
