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511
The status of elementary science teaching in some schools of Ilocos Norte, 1968-1969 [microform]
יצא לאור 1976Visual Material -
512
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The teaching of elementary science in the districts of Loon and Calape, Division of Bohol 1969-1970 [microform]
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515
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Discovery-centered versus teacher-centered patterns of instruction changes in critical thinking
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520
The teaching of science in grade five in the Division of City Schools, Manila [microform]
יצא לאור 1976Visual Material