Sinha, R. K.
Mineral economics a text book for university students - 4th ed. - New Delhi Oxford & IBH 1970 - xvi, 394p. illus.
Includes bibliographies
Mineral resources : Economics
333.8 / SIN/1970
Mineral economics a text book for university students - 4th ed. - New Delhi Oxford & IBH 1970 - xvi, 394p. illus.
Includes bibliographies
Mineral resources : Economics
333.8 / SIN/1970