Characterization of peatland soils from the high andes by <sup(13)>C NMR spectroscopy. - Segnini, A.; Souza, A.A.; Novotny, E.H.; Bonagamba, T.J.; Posadas, A.; Quiróz, R.; Milori, D.M.B.P.; Neto, L.M. (2011)