@book{ ROCA_VERA_GALLEGOS,

author = { ANTONIO ROCA ROCA and JUAN ANTONIO VERA TORRES and JOSÉ ANTONIO GALLEGOS DÍAZ } ,

title = { GEOLOGIA },

publisher = { LUIS VIVES },

number = { 1994 },

year = { 1990 },

isbn = { 84-263-0402-8 },

}