Hugo Miller, 25-jährige Geschichte der Deutsch-Amerikanischen Typographia, 1873-1898, p. 58; Jahres-Bericht, 1899-1906.
Report of Proceedings of the Twenty-fourth Annual Convention, American Federation of Labor, 1904 (Washington, 1904), p. 46.
Cigar Makers' Journal, Vol. 6, July, 1881, p. 1.
Ibid., Vol. 9, July, 1884, p. 3.