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- 50015146 contributor B1185198.
- 50015146 created "1949.".
- 50015146 date "1949".
- 50015146 date "1949.".
- 50015146 dateCopyrighted "1949.".
- 50015146 description "Includes bibliographies.".
- 50015146 extent "352 p. :".
- 50015146 isPartOf "Its School publication no. 461".
- 50015146 isPartOf "Los Angeles City School District. School publication no. 461.".
- 50015146 issued "1949".
- 50015146 issued "1949.".
- 50015146 language "eng".
- 50015146 publisher "Los Angeles,".
- 50015146 subject "LB1585 .L6".
- 50015146 subject "Science Study and teaching.".
- 50015146 title "Source book of materials for teaching science in the elementary schools.".
- 50015146 type "text".