TY - GEN A1 - May, Roland A2 - Bowen, Brian T1 - Shell Sellers, The International Dissemination Of The Zeiss-Dywidag System, 1923 - 1939 T2 - Proceedings of the 5th International Congress on Construction History, Chicago, June 3-7, 2015, vol. 2 Y1 - 2015 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/14641 SN - 978-1-329-15031-7 SP - 557 EP - 565 PB - Construction History Society of America CY - Chicago ER -