@article{articleaf7d72a5,
title   = {Organic matter and natural carbon-13 distribution in forested and cultivated oxisols},
author = {Vitorello, Victor Alexandre and Cerri, Carlos Clemente and Andreux, F G and Feller, C and Victoria, Reynaldo Luiz},
year = {1989},
journal   = {Soil Science Society of America Journal}
}