Dorr, John Van N.  1910- <br/><br/>
Physiographic, stratigraphic and structural development of the quadrilátero ferrífero Minas Gerais, Brazil / 
by John Van N. Dorr. 
 -- Washington :   United States Government Printing Office,   1969 
 - 110 p. + map. -- 
 (Geological Survey Professional Paper  ;  641-A).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estratigrafía<br/>Minas Gerais ( Brasil )
<br/><br/><label>Universal Decimal Class. No.: </label>551.7(815.1)