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5The Sourcebook for teaching science strategies, activities, and instructional resources, Grades 6-12nork Herr, Norman
Argitaratua 2008Liburua -
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8nork Kellett, Mary 1955-
Argitaratua 2005Liburua -
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10nork Lantz, Hays B.
Argitaratua 2004Liburua