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United Nations World plan of action for the application of science and technology to development
Engels | 286 pagina's | United Nations, New York, N.Y. | 1971
Gedrukt boek
United Nations World economic survey, 1969-1970
the developing countries in the 1960s; the problem of appraising progress
Engels | 248 pagina's | United Nations, New York | 1971
Gedrukt boek
United Nations