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Picture of the Waxing April Moon

With Field Model

1 Page Vertical

Questar advertisement, <em>Sky and Telescope</em>, June 1957
Questar advertisement, Sky and Telescope, June 1957. Questar Corporation

Sky and Telescope, June 1957, 384.
Sky and Telescope, July 1957, 450.

No Mention of Field Model

1 Page Vertical

Questar advertisement, <em>Sky and Telescope</em>, October 1958
Questar advertisement, Sky and Telescope, October 1958. Questar Corporation

Sky and Telescope, October 1958, 633.
Natural History, November 1959, 496.
Natural History, December 1959, 597.
Natural History, April 1960, 3.