Deismireacht APA

(1966). Encyclopedia international. Volume 19th: Valhalla-Zworykin. New York: Grolier.

Παραπομπή Chicago Style

Encyclopedia International. Volume 19th: Valhalla-Zworykin. New York: Grolier, 1966.

Deismireacht MLA

Encyclopedia International. Volume 19th: Valhalla-Zworykin. New York: Grolier, 1966.

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