000			00492nam a2200133 a 4500
005			20220228110631.0
035			_aF8901000709599
084			_aNCHRP SUM 1980
110			_aNational Cooperative Highway Research Program ( E.U.A. )
245			_aSummary of progress through 1980 / National Cooperative Hig-hway Research Program .
260			_aWashington, D.C. : Transportation Research Board
300			_a168 p.
690			_aCarreteras - Investigaciones - E.U.A.Carreteras - Proyectos - E.U.A.
999			_c59424 _d59424