| 21 | ||
| Researcher: | BHAVANI DEVI .L | |
| Guide: | A.B.Mandal | |
| University: | University of Madras | |
| Language: | English | |
| Shodhganga | ||
| 22 | ||
| Researcher: | Sulochana Devi L | |
| Guide: | Vijayan K | |
| University: | University of Kerala | |
| Shodhganga | ||
| 23 | ||
| Researcher: | Latha Devi L | |
| Guide: | Sreedevi P; Meera S Bhaskar | |
| University: | University of Kerala | |
| Language: | English | |
| Shodhganga | ||