Categories

• evs
• Biology
• Mathematics
• Biology,odiya
• Education,Zoology
• Physics,History
• psycholigy
• Economics,History
• Economic
• geography

Authors

• Laa, S
• Ahlywalia
• Anma
• Khan, M.Q,Das Ashok Ku
• jayraman,J
• Das , M.R.,Das , M.R.
• b.p. and bahl
• H.R
• ganguli and kumar,g.f.,zimmer
• elhauce, d.n.