Philippine laws on natural resources by Francisco, Vicente J.

American liberty and "natural law" by Gerhart, Eugene C.

Natural right and history by Strauss, Leo

The legal basis of Spanish imperial sovereignty by de la Costa, Horacio

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Japan's natural resources and their relation to Japan's economic future by Ackerman, Edward Augustus 1911-

Bulletin of the British Museum (natural history) historical series.

Natural right and history. by Strauss, Leo

World population and production trends and outlook by Woytinsky, Wladimir S. 1885-

Agricultural geography of Taiwan by Chang, Ching-hu

History of activities in the field of natural resources, University of Michigan by Dana, Samuel Trask 1883- ed