6 results Refine Results
  1. 1
    Published 1999
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    Arctic & Antarctic regions
  2. 2
    Published 1994
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    ERIC
  3. 3
    Published 1998
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    ERIC
  4. 4
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    Optics infobase
  5. 5
    Published 1994
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    Report Transit Cooperative Research Program /
  6. 6
    Published 1994
    Full text available from 1994 to present
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    Research results digest

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