Παραπομπή APA

Dept. of Agriculture. (1970). Contours of change. [Washington: For sale by the Supt. of Docs..

Παραπομπή Chicago Style

Dept. of Agriculture. Contours of Change. [Washington: For sale by the Supt. of Docs., 1970.

Παραπομπή MLA

Dept. of Agriculture. Contours of Change. [Washington: For sale by the Supt. of Docs., 1970.

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