| http://www.w3.org/ns/prov#value | - His international experience spans Peace Corps service in Ghana, West Africa (1962-64), forestry teaching in Ghana (1967-68), doctoral research in tropical forest ecology in Costa Rica (1969, 1970 and 1971), co-directorship of the Luther College Nottingham Year (1980-81) in Nottingham, England, and numerous educational and research visits to countries such as Sweden and the former Soviet Union.
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