@misc{misc3798bb11,
title   = {Geologia da folha de Amparo 1: 50.000},
author = {Basei, Miguel Angelo Stipp and Campos Neto, Mario da Costa and Bergmann, Magda and Figueiredo, Mário Cesar Heredia de},
year = {1986},
publisher = {Ig-Usp/Pro-Minerio}
}