Recommended specifications for large-span culverts

Manylion Llyfryddiaeth
Awduron Corfforaethol:	National Research Council (U.S.). Transportation Research Board, American Association of State Highway and Transportation Officials, United States. Federal Highway Administration, National Cooperative Highway Research Program
Awduron Eraill:	McGrath, T. J. (Timothy J.)
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	Washington, D.C. National Academy Press 2002.
Cyfres:	Report (National Cooperative Highway Research Program) 473.
Pynciau:	Culverts.
Mynediad Ar-lein:	Table of contents