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file E eye glassesAhlstrom, Otto
"Swedish Vikings used Optical Lenses"
offprint from The Optician, May 19, 1950. (Paper read at a meeting organised by the Worshipful Company of Spectacle Makers and "The Optician", Apothecaries' Hall, London, Thursday, May 18, 1950). Presented by the author
[1951- ]
1950