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3
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Study kit on training for community development
- United Nations. Department of economic and social affairs,
- 1957.
- New York :
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Report on a co-ordinated policy regarding family levels of living / United Nations. Department of economic and social affairs.
- United Nations. Department of economic and social affairs,
- 1957.
- New York :
-
New sources of energy and economic development : solar energy, wind energy, tidal energy, geothermic energy and thermal energy of the seas
- United Nations. Department of economic and social affairs,
- 1957.
- New York :