Categories

• Economics,History
• Zoology
• economy
• Physics
• Political Science,Zoology
• Education,Zoology
• Computer Science
• pyschology
• enviromental studies
• Eng

Authors

• Ray R.N.
• Sahu, Mishra ,Sahu
• Tomar & Singh
• D.K,Mohanty ,Barken. E
• Shokla
• S.C.,raychoudhuri,h.c.,raychoudhuri
• Ruoathi , Maheswari,Sharma, Sadana
• Harris , p.b.
• Uppal, Kashmir
• Others,Kapur.R