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Anchor text: The first Baker-Nunn camera. Left to right, Clyde Chivens, Harry Boller, Joseph Nunn. Source: Photograph provided by Don Winans, scanned and posted by Peter Abrahams
Anchor text: California's First Observatories
Anchor text: Blog posting asking help identifying details of Boller and Chivens image collection, March 12, 2009.
Anchor text: Boller and Chivens image directory