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- ebrary, Inc 8 toradh
- Berlin Workshop 2 toradh
- Collinson, Paul, 1969- 2 toradh
- Conference on Population and Economic Change in Less Developed Countries Philadelphia, Pa 2 toradh
- Cox, Peter R. 2 toradh
- Denton, Nancy A. 2 toradh
- Easterlin, Richard A., 1926- 2 toradh
- Eugenics Society (London, England) 2 toradh
- Internationale Weiterbildung und Entwicklung gGmbh 2 toradh
- Kochendörfer-Lucius, Gudrun 2 toradh
- Kosiński, Leszek A. 2 toradh
- Macbeth, Helen M. 2 toradh
- Peel, John 2 toradh
- Pleskovic, Boris 2 toradh
- Prothero, R. Mansell 2 toradh
- Symposium on Population Pressures upon Physical and Social Resources in the Developing Lands, Pennsylvania State University 2 toradh
- Tolnay, Stewart Emory 2 toradh
- Universities--National Bureau Committee for Economic Research 2 toradh
- World Bank 2 toradh
- Zelinsky, Wilbur, 1921- 2 toradh