Categories

• Economics
• Biology
• Physics,History
• Education,Zoology
• Mathematics
• Economics,History
• Others,Political Science
• Environmental Studies
• Biology,odiya
• geography

Authors

• R.C,Dubey
• Agrawal, S.,Das , K.M.
• T.R
• Banenjee
• Agrawal, R.C
• Dutta , Jara
• a.and maheswars
• g.s.b.
• bal
• Jacob