@misc{May2015, author = {Roland May}, title = {Shell Sellers, The International Dissemination Of The Zeiss-Dywidag System, 1923 - 1939}, booktitle = {Proceedings of the 5th International Congress on Construction History, Chicago, June 3-7, 2015, vol. 2}, editor = {Brian Bowen}, isbn = {978-1-329-15031-7}, institution = {FG Bautechnikgeschichte}, type = {conferenceobject_ref}, pages = {557 -- 565}, year = {2015}, }