^"New Music Co. Formed," The New York Clipper LXVI:13 (May 1, 1918), p. 16; "Billy Lang Promoted," The New York Clipper LXVII:29 (August 20, 1919), p. 19.
^The Boston Directory (Boston: Sampson & Murdock Company) 1908, 1910, 1912; and 1910 U. S. Federal Census.
^Advertisement, The New York Clipper LX:25 (August 3, 1912), p. 16; The Boston Directory, 1913–1918.
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