Occurrence and pedogenesis of acid sulfate soils in northeastern Brazil

1. Mendonça, S.K.G.
2. Moraes, E.M.V.D.
3. Otero, X.L.
4. Ferreira, T.O.
5. Corrêa, M.M.
6. Sousa, J.E.S.D.
7. Nascimento, C.W.A.D.
8. Neves, L.V.D.M.W.
9. Souza Junior, V.S.D.