Microscopes and Accessory Apparatus :
Leitz, Ernst
Microscopes and Accessory Apparatus : Catalogue No. 40 [electronic resource] / Ernst Leitz - Project Gutenberg, 2011 - Project Gutenberg 35842 .
Public domain in the USA.
Electronic text
Microscopes and Accessory Apparatus : Catalogue No. 40 [electronic resource] / Ernst Leitz - Project Gutenberg, 2011 - Project Gutenberg 35842 .
Public domain in the USA.
Electronic text