The symposium demon and technology then the national bureau technology this fourth international strated that roofing technology continues of standards in 1948 and retired in 1981. Following are the names of papers presented during the symposium and their authors. To advance for the betterment of the from 1967 through 1972 he was chief of symposium on roofingtechnology was the industry particularly in the use of com the materials durability and analysis most recent in the series. 
				
			
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