@article{article6409294a,
title   = {Predicting clay content on field-moist intact tropical soils using a dried, ground VisNIR library with external parameter orthogonalization},
author = {Ackerson, Jason P and Demattê, José Alexandre Melo and Morgan, Cristine L. S},
year = {2015},
doi = {10.1016/j.geoderma.2015.06.002},
journal   = {Geoderma}
}