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Oregon's mineral industry zooms upward / Ralph S. Mason -- Crack-in-the-Ground, Lake County, Oregon / Norman V. Peterson and Edward A. Groh.
The walls of Portland / Ralph S. Mason -- Tektites and Oregon's volcanic glasses / Erwin F. Lange.
Oregon's mineral industry in 1961 / Ralph S. Mason -- Oil and gas exploration in 1961 / Vernon C. Newton, Jr.
Oregon's mineral industry in 1965 / Ralph S. Mason -- Quicksilver in Oregon in 1965 / Howard C. Brooks -- Oil and gas exploration in 1965 / V. C. Newton, Jr.
Oregon's mineral and metallurgical industry in 1968 / Ralph S. Mason -- Oil and gas exploration in Oregon / V. C. Newton, Jr.
Oregon mineral production resists downward trend / Ralph S. Mason -- Oregon earthquakes, 1841 through 1958 / Joseph W. Berg, Jr., and Charles D. Baker