Παραπομπή APA

Peckworth, H. F. (1961). Concrete pipe for irrigation and drainage. Chicago: American Concrete Pipe Association.

Παραπομπή Chicago Style

Peckworth, Howard F. Concrete Pipe for Irrigation and Drainage. Chicago: American Concrete Pipe Association, 1961.

Παραπομπή MLA

Peckworth, Howard F. Concrete Pipe for Irrigation and Drainage. Chicago: American Concrete Pipe Association, 1961.

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