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-eighth annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 17 - 19, 1973

American Railway Bridge and Building Association | TIBKAT | 1973

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-third annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 18 - 20, 1978

American Railway Bridge and Building Association | TIBKAT | 1978