Clay mineralogy of the soils in the south Ecuadorian páramo region Buytaert, W. ; Sevink, J. ; De Leeuw, B. ; Deckers, J. Abstract Publication: Geoderma Pub Date: July 2005 DOI: 10.1016/j.geoderma.2004.11.021 Bibcode: 2005Geode.127..114B