Fernández Guardia, Ricardo Cartilla histórica de Costa Rica / Ricardo Fernández Guardia - San José, Costa Rica : Lehmann Editores, 1992. - 171 p.: ill., maps, ports. ; 20 cm. ISBN: 9977949131 Subjects--Geographic Terms: Costa Rica--History LC Class. No.: 106 F 1546 / F363c 1992 Dewey Class. No.: 972.86