Não informado. (1974). Directory. Transportation Research Board, National Research Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Directory. Washington: Transportation Research Board, National Research Council, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Directory. Transportation Research Board, National Research Council, 1974.
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