1979-1992 Collaboration in the committee on Conceptual and Terminological Analysis in the Social Sciences (COCTA), sponsored by UNESCO and founded by Prof. Fred W. Riggs.
1979 – ca. 1992 Mitarbeit im Committee on Conceptual and Terminological Analysis in the Social Sciences (COCTA), das von der UNESCO gesponsert wurde (gegründet von Fred W. Riggs).