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Changes of climate : proceedings of the Rome symposium organized by Unesco and the World meteorological organization = Les changements de climat : actes du colloque de Rome organisé par l'Unesco et l'Organisation météorologique mondiale / [contrib. by R.G. Veryard...et al.].
- UNESCO,
- 1963.
- Paris :
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Social aspects of economic development in Latin America / United Nations educational, scientific and cultural organization.
- 875
- UNESCO,
- 1963.
- Paris :