1940 - , Professor; School of Humanities and Social Sciences; Univ. of Papua New Guinea; Dep. of Geography and Planning; Univ. of New England; Australia; Dep. of Internat. Studies; American Univ. of Sharjah; United Arab Emirates
1957 - , Dir. of MA in European Studies; Internat. School of Humanities and Social Sciences; Univ. Amsterdam; Holländ. Soziologe