Raphael Soyer, 1946.

NUCMC data from Archives of American Art for his Papers, 1940-62 (Soyer, Raphael, 1899-; artist)

Washington Post, 11/6/87 (Raphael Soyer, 87, painter, d. 11/4/87; survived by his wife, Rebecca Soyer and his daughter, Mary Soyer)

Union List of Artists Names Online, sitio web, 31 mayo 2016: (Soyer, Raphael (American painter and lithographer, 1899-1987)) http://www.getty.edu/vow/ULANFullDisplay?find=Soyer%2C+Raphael&role=&nation=&prev_page=1&subjectid=500009897

RKD artists, sitio web, 31 mayo 2016: (Raphael Soyer, male / American painter, draftsman. Name variations: Sojer, Rafaèl'. Born: Borisoglebsk/Tombov, 1899-12-25; Deceased: New York City, 1987) https://rkd.nl/explore/artists/74069

Wikipedia, 31 mayo 2016: (Raphael Soyer (December 25, 1899 – November 4, 1987) was a Russian-born American painter, draftsman, and printmaker.) https://en.wikipedia.org/wiki/Raphael_Soyer