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THE RELATIVE EFFECTIVENESS OF SELECTED FILMSTRIPS AND SOUND MOTION PICTURES IN TEACHING SOIL CONSERVATION IN NINTH GRADE SOCIAL STUDIES CLASSES
THE RELATIVE EFFECTIVENESS OF SELECTED FILMSTRIPS AND SOUND MOTION PICTURES IN TEACHING SOIL CONSERVATION IN NINTH GRADE SOCIAL STUDIES CLASSESORTGIESEN, LEROY.
The University of Nebraska - Lincoln ProQuest Dissertations & Theses, 1954. 0007922.





