Não informado. (1982). Transportation Quarterly. Eno Foundation for Transportation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Transportation Quarterly. Westport, Conn: Eno Foundation for Transportation, 1982.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Transportation Quarterly. Eno Foundation for Transportation, 1982.
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