Não informado. (1959). Machines and Tooling. Production Engineering Research Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Machines and Tooling. Melton Mowbray, Inglaterra: Production Engineering Research Association, 1959.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Machines and Tooling. Production Engineering Research Association, 1959.
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