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Dyfyniad Arddull ChicagoNational Research Council (U.S.). Building Research Institute and Inc ebrary. Modern Masonry: Natural Stone and Clay Products : The Edited Papers and Discussions of a Research Correlation Conference [...]. Washington: National Academy of Sciences, 1956.
Dyfyniad MLANational Research Council (U.S.). Building Research Institute and Inc ebrary. Modern Masonry: Natural Stone and Clay Products : The Edited Papers and Discussions of a Research Correlation Conference [...]. National Academy of Sciences, 1956.