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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOPERATION AND MAINTENANCE.., Leif J. [ed] VINCENTSEN, और Jens Sandager [ed] JENSEN. Operation and Maintenance of Large Infrastructure Pro-jects/editor Leif J. Vincentsen; Jens Sandager Jensen. Rotterdam: A.A. Balkema, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOPERATION AND MAINTENANCE.., et al. Operation and Maintenance of Large Infrastructure Pro-jects/editor Leif J. Vincentsen; Jens Sandager Jensen. A.A. Balkema, 1998.
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