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	1.	Modern ophthalmic lenses and optical glass, by Theo. E. Obrig. by Obrig, Theodore Ernst Edition: 3d ed. Material type: Text; Format: print ; Literary form: Not fiction Publication details: New York, [Philadelphia, The Chilton company, Printing division] 1944 Availability: No items available. Add to cart (remove)
	2.	The manufacture of optical glass and of optical systems; a war-time problem [by F.E. Wright, Ordnance Reserve Corps]. by United States. Army. Ordnance Department Wright, F. E. (Frederic Eugene), 1877-1953 Series: Document (United States. Army. Ordnance Department) ; 2037. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington, Govt. Print. Off., 1921 Availability: No items available. Add to cart (remove)

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