| 21 | ||
| Researcher: | Manickavasagom Pillai, M E | |
| University: | University of Kerala | |
| Language: | English | |
| 22 | ||
| Researcher: | Kotha Pillai, M Aryavanam | |
| University: | Annamalai University | |
| Language: | English | |
| 23 | ||
| Researcher: | Pillai, M K Kesava | |
| Guide: | Nampoothiri, T P Vijayan | |
| University: | Mahatma Gandhi University | |
| Language: | Hindi | |
| Shodhganga | ||
| 24 | ||
| Researcher: | Pillai, M K Kesava | |
| Guide: | Nampoothiri, T P Vijayan | |
| University: | Mahatma Gandhi University | |
| Language: | Hindi | |
| Shodhganga | ||