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- 50061391 contributor B1198295.
- 50061391 created "1950]".
- 50061391 date "1950".
- 50061391 date "1950]".
- 50061391 dateCopyrighted "1950]".
- 50061391 extent "330-361 p.".
- 50061391 isPartOf "Publications of the United States Naval Observatory, 2d ser., v. 16, pt.2".
- 50061391 issued "1950".
- 50061391 issued "1950]".
- 50061391 language "eng".
- 50061391 publisher "[Washington, U.S.Govt.Print.Off.,".
- 50061391 subject "522.33".
- 50061391 subject "Astronomical instruments.".
- 50061391 subject "QB4 .W32 vol. 16, pt. 2".
- 50061391 title "Description of the six-inch transit circle; instrumental developments, 1932-1948.".
- 50061391 type "text".