Society, W. M. R. o. t. C. (1971). Drawing and detailing by automated procedures: Papers presented at a symposium held at Birmingham University on 13 April 1970 and organized. London : Concrete Society.
Dyfyniad Arddull ChicagoSociety, West Midlands Region of the Concrete. Drawing and Detailing by Automated Procedures: Papers Presented at a Symposium Held at Birmingham University on 13 April 1970 and Organized. London : Concrete Society, 1971.
Dyfyniad MLASociety, West Midlands Region of the Concrete. Drawing and Detailing by Automated Procedures: Papers Presented at a Symposium Held at Birmingham University on 13 April 1970 and Organized. London : Concrete Society, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.