(a)  International Union for the Scientific Studies on Population , General Meeting , Mexico , 1976 .

(b)   International Union for the Scientific Studies on Population , General Meeting , Manila , Philippines , 1980.

(c)   Regional Conference , International Geographical Union , Lagos , Nigeria , 1978 .

(d)   International Geographical Union , General meeting and Pr-Congress Meetings , Tokyo , 1980 .

(e)   International Union of Anthropological and Ethrological Sciences (Nomadic Peoples Commission) Nairobi , 1980 .

(f)   The World Conference on Disaster Reduction, January,2005,Kobe,Japan.