Categories

• Economics,History
• enviromental studies
• Chemistry
• Economic
• Political Science,History
• Politicalscience
• Physics
• Others,English
• englisg
• Biology

Authors

• Dasson , Neale
• A.C,Kapnr
• sachada and gupta
• P.,Maiti ,P.,Maiti
• Nayak, l., k.b. and nayak
• Pradhan S.
• Dwivedi, a.n. ,verma and agrawal
• Coomarswarli
• Verma , v. ,Sharma, p.d.
• Barrie