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 eighty-first annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 13 - 15, 1976

American Railway Bridge and Building Association | TIBKAT | 1976

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 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

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