Proceedings of the eighty-fifth annual conference of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 15 - 17, 1980

American Railway Bridge and Building Association | TIBKAT | 1980

Proceedings of the eighty-sixth annual conference of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 14 - 16, 1981

American Railway Bridge and Building Association | TIBKAT | 1981

Proceedings of the eighty-second annual convention of the American Railway Bridge & Building Association : held at Chicago, Illinois, September 26 - 28, 1977

American Railway Bridge and Building Association | TIBKAT | 1977

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 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