Bibliographic references
Book
British Optical Association library and museum catalogue
Resource verified by SHCG editorial group
Author(s): J H Sutcliffe (ed)
Edith Chittell
Date(s): 1932
Publisher: British Optical Association London 1932
Notes:
Illustrated ASIN: B000Y072QQ
Keywords:
bifocal
SHIC codes:
1,1.4,1.412,1.4121,4.9
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