Nondestructive evaluation of aging railroads [electronic resource] : 7-8 June 1995, Oakland, California / Donald E. Gray, Daniel Stone, chairs/editors ; sponsored and published by SPIE--the International Society for Optical Engineering
Electronic reproduction. Bellingham, Wash. : SPIE--the International Society for Optical Engineering, 2004. Mode of access: World Wide Web. Access restricted to SPIE Digital Library subscribers.