Categories

• geography
• Others,Physics
• Environmental Studies
• psycholigy
• Others,English
• Others
• Economics,History
• Hindi
• enviromental studies
• Botany,Physics

Authors

• Rout,K.C
• Nagpal, c.s.,Nagpal, c.s.
• t.,williams
• Atkine
• Devi, Shakuntala
• Bhatnagar
• Singh.K
• Vanshney
• Singh, R.
• Gupta, m.g.