Categories

• geography
• enviromental studies
• Other
• Logic
• Economics,Political Science
• Hindi
• Chemistry,odiya
• Education
• Others,Chemistry
• Political Science,Zoology

Authors

• Groven, Groven
• Dwivedi,F.E
• e.l.
• Jit
• Potten , Goldleg
• Mishra , P.K,Roy , A.C
• sharma and sadana
• Das , r.r.
• roy and padhy
• Panigrahhi