found: His El Che Guevara, 1979:t.p. (Manuel Agustín Aguirre)
found: LC data base, 11/22/83(hdg.: Aguirre, Manuel Agustín)
found: Pensamiento político y social, 2009:t.p. (Manuel Agustín Aguirre) p. 10, etc. (Manuel Agustín Aguirre Ríos; b. July 16, 1903 in Loja [Ecuador]; d. 1992)
found: Wikipedia, viewed May 20, 2021:Manuel Agustín Aguirre (Manuel Agustín Aguirre Ríos, born July 12, 1903 in Loja, died September 12, 1992 in Quito, was an Ecuadorian politician and educator, who served as secretary general of the Partido Socialista and founder of the Partido Socialista Revolucionario (PSRE); he served as provost for the Universidad Central del Ecuador) - https://es.wikipedia.org/wiki/Manuel_Agust%C3%ADn_Aguirre
