Ore deposits 7 Mines and mineral resources 6 SCIENCE / Earth Sciences / Mineralogy 5 Biography 4 Geology, Economic 4 Essays 3 Igneous rocks 3 Malayalam drama 3 Malayalam; Drama 3 Mineral industries 3 Minerals 3 Prospecting 3 മലയാളം; നാടകം 3 Children's literature 2 Communication 2 Crystallization 2 Environmental aspects 2 Folklore 2 Graph theory-- Mathematics 2 Magmatism 2 Mathematics 2 Mineral resources 2 Mineralogy, Determinative 2 Mines 2 Novel 2 Sedimentary Rocks 2 TECHNOLOGY & ENGINEERING / Petroleum 2 THE ANALYSIS OF MINERALS AND ORES OF THE RARE ELEMENTS 2 മലയാളം; മലയാളം നോവല്‍ 2 Archaeological chemistry 1