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  1. 1
    Total field aeromagnetic anomaly map, Cascade Mountain Range, central Oregon /
    by Couch, Richard W.
    Published 1978
    Government Document Map
  2. 2
    Total field aeromagnetic anomaly map : Cascade Mountain Range, Southern Oregon /
    Published 1980
    Map
  3. 3
    Total field aeromagnetic anomaly map : Cascade Range, northern Oregon /
    by Couch, Richard W.
    Published 1984
    Government Document Map
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