フロートガラス
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences 314 (1516): 1-25. http://www.jstor.org/stable/2416528.
↑ US patent 2911759 – Manufacture of flat glass
↑ B. H. W. S. de Jong, "Glass"; in "Ullmann's Encyclopedia of Industrial Chemistry"; 5th edition, vol. A12, VCH Publishers, Weinheim, Germany, 1989, ISBN 3-527-20112-2, p 365-432.
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