Matches in Library of Congress for { <http://lccn.loc.gov/68031221> ?p ?o. }
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- 68031221 contributor B1854763.
- 68031221 created "[1968]".
- 68031221 date "1968".
- 68031221 date "[1968]".
- 68031221 dateCopyrighted "[1968]".
- 68031221 extent "205 p.".
- 68031221 isPartOf "Newsbook".
- 68031221 issued "1968".
- 68031221 issued "[1968]".
- 68031221 language "eng".
- 68031221 publisher "Silver Spring, Md., National observer".
- 68031221 subject "551.4/6".
- 68031221 subject "GC65 .G72".
- 68031221 subject "Ocean engineering.".
- 68031221 subject "Underwater exploration.".
- 68031221 title "Sea horizons.".
- 68031221 type "text".