00739cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040004200111050002000153082001100173100002700184245006800211250001100279260007800290300005100368504003000419650001200449650001900461999001700480sg 45000050 DLC20260227112745.0770416s1944    xx            000 0 eng c  asg 45000050   a(OCoLC)2892933  aU. S. Surg.-gen. off. Libr.cODadDLC00aRE961b.O3 1944  a617.751 aObrig, Theodore Ernst.10aModern ophthalmic lenses and optical glass,cby Theo. E. Obrig.  a3d ed.  aNew York,a[Philadelphia,bThe Chilton company, Printing division]c1944.  axix, 323 p.billus., diagrs. (1 fold.)c22 cm.  aBibliography: p. 302-306. 0aLenses. 0aOptical glass.  c90537d90537