O'Halloran, D. Geological and landscape conservation : proceedings of the Malvern International Conference 1993. - London : Geol.Soc, 1994. - 530 p. : il. ; 25 cm ISBN: 1897799098 Subjects--Topical Terms: GeologíaMedio ambientePlanificaciónUtilización terreno Index Terms--Genre/Form: Seriemon Universal Decimal Class. No.: 55:574