XANTHAKOS, P. P. (1994). Ground Control And Improvesment Petros P Xanthakos , Lee W. Abramson, Donald A. Bruce. John Willey & Sons Inc.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रXANTHAKOS, Petros P. Ground Control And Improvesment Petros P Xanthakos , Lee W. Abramson, Donald A. Bruce. John Willey & Sons Inc, 1994.
एमएलए (8वां संस्करण) प्रशस्ति पत्रXANTHAKOS, Petros P. Ground Control And Improvesment Petros P Xanthakos , Lee W. Abramson, Donald A. Bruce. John Willey & Sons Inc, 1994.
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