Annuires hydrologique du congo belge et du ruanda-Urundi. 

 - Bruxelles :    Institut Royal Colonial Belge,    1952. 
 - v. :    ill. ;    24 cm. 
 - v. 8, no. 5 (1952)- 
<br/><br/>  Latest issue consulted Vol. 8, no. 5 (1952) 
<br/><br/><label>Dewey Class. No.: </label>S PER 606.1493 A 3