000			00867cam a2200181 i 4500
020			_a0309028213
082	0	0	_a625.735 _bNAT
245	0	0	_aInvestigation and development of materials resources = _cInvestigación y desarrollo de recursos de materiales = Investigation et développement des gisements de matériaux routiers.
260			_aWashington : _bTransportation Research Board, Commission on Sociotechnical Systems, National Research Council, National Academy of Sciences, _c1979.
300			_axxiv, 220 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 materials _zDeveloping countries.
650		0	_aRoads _zDeveloping countries _xSurveying.
650		0	_aMCE
710	2		_aNational Research Council (U.S.).
942			_cBK
999			_c7824 _d7824