El carbón de la mina "La Negra," Villa Unión, La Rioja y su posición tectónica
By: por Arnold Heim ...
Published: 1946
Place of publication: Buenos Aires
Language: spa
Format: 123
Number of pages: 21
Subjects: Coal mines and mining -- Argentina -- La Rioja (Province); Geology -- Argentina -- La Rioja (Province)
Notes: At head of title: República argentina. Secretaría de industria y comercio. Dirección de minas, geología ...