National Bituminous Concrete Association (U.S.). Quality Improvement Program. (1961). QUIPS: Quality Improvement Program synopsis. National Bituminous Concrete Association.
Dyfyniad Arddull ChicagoNational Bituminous Concrete Association (U.S.). Quality Improvement Program. QUIPS: Quality Improvement Program Synopsis. College Station, Tex.: National Bituminous Concrete Association, 1961.
Dyfyniad MLANational Bituminous Concrete Association (U.S.). Quality Improvement Program. QUIPS: Quality Improvement Program Synopsis. National Bituminous Concrete Association, 1961.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.