Alcocer, Alfonso La campana de Dolores / Alfonso Alcocer - Mexico : Departamento del Distrito Federal , c1985. - 122 p. : fot. ISBN: 968-816-061-X Subjects--Topical Terms: Monumentos historicos---Conservacion---Mexico Subjects--Geographic Terms: Dolores Hidalgo, Guanajuato---Historia Dewey Class. No.: 972.4 ALC