1. Preparation of standard test methods for classifying roof coverings according to their fire resisting properties;Riddle GW;NFPA Q,1910
2. Roof coverings and their fire resisting properties;Colyer WT;NFPA Q,1917
3. Report of Committee on Roofs and Roofings Proc. NFPA12 138–166(1908).
4. Report of the Committee on Devices and Materials Proc. NFPA14 44–52(1914).
5. Report of the Committee on Devices and Materials Proc NFPA15 28–45(1911).