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|aRussell, Helen Ross|d1915-
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|aTen-minute field trips : |ba teacher's guide to using the school for environmental studies / |cby Helen Ross Russell ; illustrated by Klaus Winckelmann.
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|a10-minute field trips
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|a3rd ed., rev.
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|aArlington, VA : |bNSTA Press, |cc2001.
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|ax, 163 p. : |bill. ; |c26 cm.
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|aEcology--Study and teaching (Elementary)
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|aEnvironmental sciences--Study and teaching (Elementary)
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|aNatural history--Study and teaching (Elementary)
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|aNature study--Activity programs.
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|aWinckelmann, Klaus.
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|aKCBS
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