Painter, W. T. (1973). Proceedings of Conference on Soft Ground Tunneling, University of Wisconsin, Milwaukee Extension, 1973. University of Wisconsin, Milwaukee Extension.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPainter, William T. Proceedings of Conference on Soft Ground Tunneling, University of Wisconsin, Milwaukee Extension, 1973. [Milwaukee, Wis.]: University of Wisconsin, Milwaukee Extension, 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPainter, William T. Proceedings of Conference on Soft Ground Tunneling, University of Wisconsin, Milwaukee Extension, 1973. University of Wisconsin, Milwaukee Extension, 1973.
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