999 resultados para environmental text
Resumo:
"UC-11."
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Includes bibliographical references (pages 32-33).
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"Contract SNPC-6".
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Includes bibliographical references.
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"July 1980"
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Includes bibliographical references.
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"DOE/EV-0078."
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"DOE/EV-0116."
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Presents children in grade 1 through 3 with information about environmental dangers and ecology.
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Includes index.
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Cover title.
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"PB 208 822."
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Prepared for National Science Foundation.
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Photocopy. Springfield, Va. : Reproduced by National Technical Information Service, [197-]
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"June 1972."