Kumar, BrajeshKumar, HirdeshHirdeshKumar2025-09-042026-03-282025-09-042023-01-01https://repository.iitgn.ac.in/handle/IITG2025/32723ill.; hbk.; 30 cmen-USSunspotsMagnetic eldsQuiet-SunChromosphereStudy of the evolution of velocity and magnetic fields in the solar atmospherePh.D. Thesesxvii, 169p.123456789/620