| 1 | Energy consumption pattern in household sector with special reference to Visakhapatnam City |
| Researcher: | Varma, A V Naga |
| Guide: | Ratnam, C |
| University: | Andhra University |
| Language: | English |
| 2 | |
| Researcher: | Pal, N A d |
| Guide: | Ratnam, C |
| University: | Andhra University |
| Language: | English |
| 3 | Food problem, foodgrain economy and foodgrain imports of India |
| Researcher: | Ratna Kumari, Bandila |
| Guide: | Leela, PRatnam, C |
| University: | Andhra University |
| Language: | English |
| 4 | Growth and instability of foodgrains production in Andhra Pradesh: A district wise analysis |
| Researcher: | Bhaskara Rao, Akula Venkata Siva |
| Guide: | Ratnam, C |
| University: | Andhra University |
| Language: | English |
| 5 | Growth and structural changes in the Indian Industry and environmental pollution |
| Researcher: | Sudha, M |
| Guide: | Ratnam, C |
| University: | Andhra University |
| Language: | English |
| 6 | Growth and supply response of principal agricultural crops in Andhra Pradesh |
| Researcher: | Ariamma, L |
| Guide: | Ratnam, C |
| University: | Andhra University |
| Language: | English |