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161Published 1978Subjects “...Science Study and teaching (Primary)...”
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162
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163
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164by Crabtree, Barbara (Barbara Jeanette)Subjects “...Science Study and teaching (Preschool)...”
Published 1982
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165
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166Published 1979Subjects “...Science Examinations, questions, etc....”
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167Published 1918Subjects “...Science Periodicals....”
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168Published 1938Subjects “...Science Periodicals....”
Journal -
169
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170
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171by McKay, Herbert, 1881-Subjects “...Science Experiments Study and teaching....”
Published 1918
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172Published 1968Subjects “...Science Study and teaching (Secondary)...”
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173Published 1969Subjects “...Science Examinations, questions, etc....”
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174
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175
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176
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177
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178
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179
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180