Boletim.

Bibliographic Details
Corporate Author:	Brazil. Laboratório da Produção Mineral
Format:	Serial
Language:	Portuguese
Published:	Rio de Janeiro : Laboratorio da Prodcao Mineral.
Subjects:	Mines and mineral resources > Brazil. Mines and mineral resources.

Description
Published:	[no.] 1- 1940-
Item Description:	Occassional summaries in English and Portugese.
Physical Description:	illustrations ; 23 cm.