Rai, G. (2023). Non-conventional Energy Sources (06th.). Khanna Publications.
Lua i Stíl Chicago (17ú heag.)Rai, G.D. Non-conventional Energy Sources. 06th. New Delhi: Khanna Publications, 2023.
Lua MLA (9ú heag.)Rai, G.D. Non-conventional Energy Sources. 06th. Khanna Publications, 2023.
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