Não informado. (1966). World survey of current research and development on roads and road transport. International Road Federation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. World Survey of Current Research and Development on Roads and Road Transport. Washington: International Road Federation, 1966.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. World Survey of Current Research and Development on Roads and Road Transport. International Road Federation, 1966.
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