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- catalog contributor b6567187.
- catalog created "[1950]".
- catalog date "1950".
- catalog date "[1950]".
- catalog dateCopyrighted "[1950]".
- catalog extent "222 p.".
- catalog issued "1950".
- catalog issued "[1950]".
- catalog language "eng".
- catalog publisher "Washington, Public Affairs Press".
- catalog subject "Q180.A1 F7 1950".
- catalog subject "Research.".
- catalog title "The principles of scientific research.".
- catalog type "text".