| 1 | |
| Researcher: | Herbert, G S |
| University: | Sri Venkateswara University |
| Language: | English |
| 2 | |
| Researcher: | Herbert, G S |
| Guide: | Barlingay, S S |
| University: | Sri Venkateswara University |
| Language: | English |
| 3 | |
| Researcher: | Herbert, G Daniel |
| University: | University of Madras |
| Language: | English |