1. Roofs, Design, Application and Maintenance;Baker,1980
2. NRCA Market Survey Shows Golden Days of Roofing are Fading;LaValley;Professional Roofing,1993
3. Eyeing the Industry;Good;Professional Roofing,2001
4. Polymeric Building Materials;Feldman,1989
5. Application of Polymer and Asphalt Chemistries in Roofing;Gorman,1995