Bibliographic references
Journal article
Old English patents for spectacles from 1783 until the end of the 19th century
Resource verified by SHCG editorial group
Author(s): A T Leach
Date(s): 1998
Publisher: Ophthalmic Antiques International Collectors' Club 1998
Keywords:
bifocal
SHIC codes:
1,1.4,1.412,1.4121,3,3.7,3.74
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