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- catalog contributor b4585255.
- catalog created "1972]".
- catalog date "1972".
- catalog date "1972]".
- catalog dateCopyrighted "1972]".
- catalog extent "99 p.".
- catalog isPartOf "PREP: Putting research into educational practice, no. 33".
- catalog issued "1972".
- catalog issued "1972]".
- catalog language "eng".
- catalog publisher "[Washington] National Center for Education[al] Communication; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.,".
- catalog spatial "United States.".
- catalog subject "Ecology Study and teaching.".
- catalog subject "Environmental policy Study and teaching United States.".
- catalog title "Environmental education programs and materials, by Stanley L. Helgeson [and others]".
- catalog type "text".