TY  - BOOK
AU  - Calver George
TI  - New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured
KW  - Astronomy
UR  - https://new.zodml.org/sites/default/files/2023-07/new_edition_of_hints_on_silver-glass_reflecting_telescopes_manufactured_by_calver_george_tag_scientific_apparatus_and_instruments_reflecting_telescopes.epub
ER  -