| 1 | Studies on coal macerals with special reference to high sulphur coals of India |
| Researcher: | Ray, Manmohan |
| University: | Jadavpur University |
| Language: | English |
| 2 | |
| Researcher: | Ray, Manmohan |
| University: | University of Calcutta |
| Language: | English |
| 3 | Foreign investments in British India from 1857-1858 to 1927-1928 |
| Researcher: | Ray, Manmohan |
| University: | University of Calcutta |
| Language: | English |