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  1. The hearings on Crater Lake water contamination held at Crater Lake National Park, Oregon in 1975 [volume 1]

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    ill.; Dates on each section and the addendum are "August 11, 1975."; "Ernest Borgman, General Superintendent Crater Lake National Park" and "LeRoy Fisk, Chairman of the Committee and affiliated with Oregon...

  2. The hearings on Crater Lake water contamination held at Crater Lake National Park, Oregon in 1975 [volume 2]

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    ill.; Dates on each section and the addendum are "August 11, 1975."; "Ernest Borgman, General Superintendent Crater Lake National Park" and "LeRoy Fisk, Chairman of the Committee and affiliated with Oregon...

  3. The hearings on Crater Lake water contamination held at Crater Lake National Park, Oregon in 1975 [volume 3]

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    ill.; Dates on each section and the addendum are "August 11, 1975."; "Ernest Borgman, General Superintendent Crater Lake National Park" and "LeRoy Fisk, Chairman of the Committee and affiliated with Oregon...

  4. The hearings on Crater Lake water contamination held at Crater Lake National Park, Oregon in 1975 [volume 4 addendum]

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    ill.; Dates on each section and the addendum are "August 11, 1975."; "Ernest Borgman, General Superintendent Crater Lake National Park" and "LeRoy Fisk, Chairman of the Committee and affiliated with Oregon...

  5. The hearings on Crater Lake water contamination held at Crater Lake National Park, Oregon in 1975 [volume 4]

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    ill.; Dates on each section and the addendum are "August 11, 1975."; "Ernest Borgman, General Superintendent Crater Lake National Park" and "LeRoy Fisk, Chairman of the Committee and affiliated with Oregon...

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