Proceedings of the seventy-seventh annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 18 - 20, 1972
Annual convention of the American Railway Bridge & Building Association ; 77 ; 1972 ; Chicago, Ill. Annual convention of the American Railway Bridge & Building Association ; 77 (Chicago, Ill.) : 1972.09.18-20
1972
172 S.
Ill.
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