Baade, W. A Search For the Nucleus of Our Galaxy. Publications of the Astronomical Society of the Pacific. August 1946, 58 (343): 249–252. Bibcode:1946PASP...58..249B. doi:10.1086/125835.
Baade, W. A Search For the Nucleus of Our Galaxy. Publications of the Astronomical Society of the Pacific. August 1946, 58 (343): 249–252. Bibcode:1946PASP...58..249B. doi:10.1086/125835.