United States. Congress. Senate. Committee on Agriculture and Forestry
Ferdinand Sommer
Yun Yuan Wong
Jacques Guillon
William Wister Haines
U.S./Korea Electric Power Technologies Seminar Mission (1994 Seoul, Korea)
Gerald Foley
United States. Congress. Senate. Committee on Energy and Natural Resources.
Richard A. Uher
H. Loosli
United Nations. Economic Commission for Europe.
David E. Nye
Jos Arrillaga
William Kamkwamba
Pierre George
Wes Coates
Association pour l'histoire des chemins de fer en France. Colloque
All India Power Engineers' Conference (2nd 1957 Bangalore)
John Saunders
Joseph Peter Schaenzer