Langlands , I., & Thomas , A. (1939). Handbook of structural timber design. Government Printer.
Dyfyniad Arddull ChicagoLanglands , Ian, and A.J Thomas. Handbook of Structural Timber Design. Melbourne: Government Printer, 1939.
Dyfyniad MLALanglands , Ian, and A.J Thomas. Handbook of Structural Timber Design. Government Printer, 1939.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.