TY  - JOUR 
T1  - Transformations in occluded light fraction organic matter in a clayey oxisol: evidence from 13C-CPMAS-NMR and delta13C Signature
JO  - Revista Brasileira de Ciência do Solo
A1  - Roscoe, R.
A1  - Buurman, P.
A1  - van Lagen, B.
A1  - Velthorst, E.
SN  - 0100-0683
UL  - 10.1590/S0100-06832004000500003
VL  - 28 
Y1  - 2004
PB  - Brasil 
ER  -