Symposium sobre yacimientos de manganeso.
By: Editado por Jenaro González Reyna.
Contributors: González Reyna, Jenaro, 1906- ed.
Published: 1956
Place of publication: México
Language: spa
Subjects: Manganese ores.
Notes: First circular in Spanish, English, and French] text in German, English, French, Italian, or Spanish.
Includes bibliographies.
Table of contents: title: -t. 1. El manganeso en general.-t. 2. Africa.-t. 3. América.-t. 4. Asia y Oceania.-t. 5. Europa.