@inproceedings{inproceedingsd91a0802,
title   = {Cupriferous cryptomelane origened from the weathering of the copper ore deposits of salobo 3a, Serra dos Carajas, Brazil},
author = {Toledo, Maria Cristina Motta de and Parisot, J. C. and Melfi, Adolpho José},
year = {1986},
booktitle   = {Congress Geochemistry of the Earth Surface and Processes of Mineral Formation}
}