Proceedings of the seventy-seventh annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 18 - 20, 1972

American Railway Bridge and Building Association | TIBKAT | 1972

Proceedings of the seventy-sixth annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 13 - 15, 1971

American Railway Bridge and Building Association | TIBKAT | 1971

Proceedings of the seventy-ninth annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, October 1 - 3, 1974

American Railway Bridge and Building Association | TIBKAT | 1974

Proceedings of the eightieth annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 15 - 17, 1975

American Railway Bridge and Building Association | TIBKAT | 1975

Proceedings of the eighty-eighth annual conference of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 12 - 14, 1983

American Railway Bridge and Building Association | TIBKAT | 1983