Highway-rail grade crossing surfaces / Hoy A. Richards
Richards, Hoy A.
Highway-rail grade crossing surfaces / Hoy A. Richards - Washington, D.C. : TRB - [62] p. - Synthesis of highway practice ; 250 / Transportation Resear-ch Board .
Highway-rail grade crossing surfaces / Hoy A. Richards - Washington, D.C. : TRB - [62] p. - Synthesis of highway practice ; 250 / Transportation Resear-ch Board .