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Oregonian (Firm) Willamette River Lectures and lecturing With digital objects
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Articles discussing Portland sewage disposal issue and Ed F. Averill lecture
Articles discussing Portland sewage disposal issue and Ed F. Averill lecture
Articles discussing proposed dam construction, salmon conservation, and "Woods, waters and w...
Articles discussing proposed dam construction, salmon conservation, and "Woods, waters and wildlife" lecture
Articles discussing William Finley lecture tour and effects of dams on fish populations
Articles discussing William Finley lecture tour and effects of dams on fish populations