Παραπομπή APA

Perry, W. J. (1987). Technologies to maintain biological diversity. Washington: Congress of the United States.

Παραπομπή Chicago Style

Perry, William J. Technologies to Maintain Biological Diversity. Washington: Congress of the United States, 1987.

Παραπομπή MLA

Perry, William J. Technologies to Maintain Biological Diversity. Washington: Congress of the United States, 1987.

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