Categories

• geography
• Political Science
• Education,Zoology
• Mathematics
• Political Science,History
• Environmental Studies
• Other
• Others,Biology
• Economics
• Botany

Authors

• Pandaba
• Prasad, Singh
• Khanna S.K
• Davies, h.a.
• Pelezar, Chan , Knieg
• agrawala
• Goyal Tarun
• saxena S,N.
• Trotter
• v. ,menon