@article{article69124247,
title   = {Sulphur in brazilian agriculture},
author = {Malavolta, E. and Vitti, G C and Rosalem, C A and Kliemann, H J and Pageria, N K and Guimaraes, P T G and Malavolta, M L},
year = {1987},
journal   = {Sulphur in Agriculture}
}