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The sex and age distributions of population : the 1990 revision of the United Nations global population estimates and projections / UN. Department of international economic and social affairs.
- UN,
- 1991.
- New York :
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World population prospects 1990 / UN. Department of international economic and social affairs.
- UN,
- 1991.
- New York :
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Concise report on the world population situation in 1990 : with a special report on population trends and policies in the least developed countries / UN. Department of international economic and social affairs.
- UN,
- 1991.
- New York :