https://digital.sciencehistory.org/works/9yzlz0y Letter to Otto Haas, December 4, 1913 http://rightsstatements.org/vocab/NKC/1.0/ Haas, Otto, 1872-1960 1913-Dec-03 Letter from an unknown sender to Otto Haas (1872-1960). The author asks Haas when he can visit Vassar College and mentions Phoebe Waterman Haas (1882-1967). Phoebe Waterman Haas was one of the first American women to earn her doctorate in astronomy in 1913. After graduating, she was appointed as an assistant to the Argentine National Observatory in Córdoba, Argentina. The two were married on February 22, 1914. Phoebe Waterman Haas Papers New York (State)--Poughkeepsie English Haas, Otto, 1872-1960 Waterman Haas, Phoebe, 1882-1967 Vassar College. Observatory text personal correspondence https://digital.sciencehistory.org/downloads/deriv/3h3bs8o/thumb_large_2X?disposition=inline https://digital.sciencehistory.org/works/9yzlz0y http://rightsstatements.org/vocab/NKC/1.0/ personal correspondence https://digital.sciencehistory.org/downloads/deriv/3h3bs8o/download_full?disposition=inline https://digital.sciencehistory.org/downloads/deriv/qmzbf5o/download_full?disposition=inline