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Questar Spies on a Bald Eagle

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Questar advertisement, <em>Natural History</em>, May 1973
Questar advertisement, Natural History, May 1973. Questar Corporation

Natural History, May 1971, 96.
Scientific American, May 1971, 9.
Natural History, June-July 1971, 75.
Modern Photography, June 1971, 6.
Modern Photography, July 1971, 6.
Scientific American, August 1971, 45.
Natural History, November 1971, 80.
Scientific American, December 1971, 7.
Modern Photography, December 1971, 47.
Natural History, February 1972, 92.
Modern Photography, March 1972, 6.
Natural History, April 1972, 72.
Scientific American, August 1972, 43.
Modern Photography, August 1972, 6.
Natural History, May 1973, 77.