000			00720cam a2200169 i 4500
020			_a0309028205
082	0	0	_a625.734 _bNAT
245	0	0	_aRoadside drainage - Drenaje del borde de la carretera - Drainage des bas-côtes de la route.
260			_aWashington : _bTransportation Research Board, Commission on Sociotechnical Systems, National Research Council, National Academy of Sciences, _c1979.
300			_axxii, 196 p. : _bill. ; _c28 cm.
500			_a"Prepared under contract AID-OTR-C-1591, project 931-1116, U.S. Agency for International Development.
500			_aIncludes index.
650		0	_aRoad drainage _zDeveloping countries.
650		0	_aMCE
710	2		_aNational Research Council (U.S.).
942			_cBK
999			_c7784 _d7784