Symposium sobre Yacimientos de Manganeso
Subtitle: XXCongreso Geolo gico Internacional
By: editado por Jenaro Gonza lez Reyna. Tomo 2, Africa.
Contributors: Gonza lez Reyna, Jenaro.; International Geological Congress, (20th : 1956 : Mexico City)
Publisher: [Congreso Geolo gico Internacional]
Published: 1956
Place of publication: Me xico
Language: eng
Number of pages: 300
Subjects: Manganese mines and mining -- Africa.; Manganese ores -- Africa -- Geology.
Notes: Text in English,German, Spanish and French.