Dalzell, R. (1972). Simplified Cocrete Masonry Planning And Building Ralph Dalzell. McGraw-Hill.
Dyfyniad Arddull ChicagoDalzell, Rlph. Simplified Cocrete Masonry Planning And Building Ralph Dalzell. McGraw-Hill, 1972.
Dyfyniad MLADalzell, Rlph. Simplified Cocrete Masonry Planning And Building Ralph Dalzell. McGraw-Hill, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.