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Mary Allen and Ethel Wilcocks measuring astrographic plates 1941

Made in Sydney, New South Wales, Australia, 1941-1979.
Photograph, Mary Allen and Ethel Wilcocks measuring astrographic plates, silver gelatin print, photographed by Waterford, 6th February 1941, used by Sydney Observatory, Sydney, New South Wales, Australia, 1941-1979

A black and white photograph of the Mary Allen and Ethel Wilcox measuring astrographic plates at Sydney Observatory.
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