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3
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Population growth, changing agricultural practices, and environmental degradation in Zaire / David Shapiro.
- Pennsylvania state university,
- 1993.
- University Park, PA :
-
Charitable contributions to international relief and development / David C. Ribar and Mark O. Wilhelm.
- Pennsylvania state university. Department of economics,
- 1993.
- University Park, PA :
-
Fertility and the status of women in Kinshasa / David Shapiro and Oleko Tambashe.
- Pennsylvania state university. Department of economics,
- 1993.
- University Park, PA :