His Las calles de Puebla, 1991: t.p. (Dr. Hugo Leicht, bibliotecario de la Biblioteca Palafoxiana de Puebla) p. xi (b. in Hamburg, Germany, Aug. 27, 1881)

Enc. de México, 1987 (Leight, Hugo, b. 1885 in Berlin; d. in Berlin 1952; lived in Puebla, Mexico)

Dic. Porrúa, hist., bio. y geo. de Méx., 1986 (Leicht, Hugo, 1885-1952; historian and librarian; b. in Germany; moved to Puebla; director, Inst. de la Colonia Alemana and Biblioteca Palafoxiana)

Dicc. enc. de Méx., 1989 (Leight, Hugo, b. and died in Germany, 1885-1952; lived in Puebla, Mexico)