Photograph of Mary Allen and Ethel Wilcocks at Sydney Observatory

Photographed by Waterford in Sydney, New South Wales, Australia, 06/02/1941.
Photograph, silver gelatin print, depicting Mary Allen and Ethel Wilcocks measuring astrographic plates, paper, photographed by Waterford, 6 February 1941, used by Sydney Observatory, Sydney, New South Wales, Australia, 1941-1979
View more