Matches in Library of Congress for { <http://lccn.loc.gov/49049696> ?p ?o. }
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- 49049696 contributor B1170722.
- 49049696 created "[1949]".
- 49049696 date "1949".
- 49049696 date "[1949]".
- 49049696 dateCopyrighted "[1949]".
- 49049696 extent "ix, 32 p.".
- 49049696 issued "1949".
- 49049696 issued "[1949]".
- 49049696 language "eng".
- 49049696 publisher "Columbus, Ohio, Photo-Engravers Research".
- 49049696 subject "Copper.".
- 49049696 subject "Ferric chloride.".
- 49049696 subject "Photoengraving.".
- 49049696 subject "TR970 .S32".
- 49049696 title "The ferric chloride etching of copper for photoengravings, by Roland M. Schaffert [and others]".
- 49049696 type "text".