Trombotto Liaudat, Dario Survey of cryogenic processes, periglacial forms and permafrost conditions in South America - Sao Paulo Instituto Geológico de Sao Paulo 2000 - pp. 33-55 ilus., tbls. ISSN: 0100-929x Subjects--Topical Terms: GLACIOLOGIAMORFOLOGIA GLACIARPERMAFROSTSUELOS HELADOS Subjects--Geographic Terms: AMERICA DEL SURANDES