Não informado. (1971). Closed Loop: The magazine of mechanical testing. MTS Systems.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Closed Loop: The Magazine of Mechanical Testing. Minneapolis, Minn: MTS Systems, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Closed Loop: The Magazine of Mechanical Testing. MTS Systems, 1971.
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