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1991
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1992
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1993
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1994
A proposed module on the concept environment in the new social studies for grade five
Published 1977Thesis -
1995
A proposed instructional module on the concept "change" for second year high school
Published 1977Thesis -
1996
A proposed instructional module on the concept "change" for first year high school
Published 1977Thesis -
1997
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1998
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1999
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2000