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Birg, Herwig, Bruno Fritsch, and Vittorio Hösle. Population, Environment and Sustainable Livelihood: Proceedings of Symposion V, Session 2 of the World Congress of Sociology, Held at the University of Bielefeld, July 18-23, 1994. Bielefeld, 1995.

Birg, Herwig, et al. Population, Environment and Sustainable Livelihood: Proceedings of Symposion V, Session 2 of the World Congress of Sociology, Held at the University of Bielefeld, July 18-23, 1994. 1995.