National Research Council (Estados Unidos). Transportation Research Board, & National Research Council (Estados Unidos). Transportation Research Board. (1979). Conservacion de caminos sin pavimentar. Washington: National Academy of Sciences.
Chicago Style CitationNational Research Council (Estados Unidos). Transportation Research Board, and National Research Council (Estados Unidos). Transportation Research Board. Conservacion De Caminos Sin Pavimentar. Washington: National Academy of Sciences, 1979.
MLA CitationNational Research Council (Estados Unidos). Transportation Research Board, and National Research Council (Estados Unidos). Transportation Research Board. Conservacion De Caminos Sin Pavimentar. Washington: National Academy of Sciences, 1979.