The 1981-85 tariff changes and effective protection of manufacturing industries 由 Bautista, Romeo Marcelo

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Down to earth environment and human needs 由 Eckholm, Erik P.

Paper and silk the conservation of Asian works of art [videorecording]

Preserving the environment new strategies for behavior change 由 Geller, E. Scott 1942-

The Philippine environment 1980 fourth annual report.

State of the art environmental protection research.

Environmental geology 由 Keller, Edward A.

Root crops in Eastern Africa proceedings of a workshop held in Kigali, Rwanda, 23-27 November 1980.

Down to earth environment and human needs 由 Eckholm, Erik P.

Global environmental issues United Nations Environment Programme