Categories

• Others,Physics
• Others,Education
• Political Science,History
• Economics,Political Science
• Mathematics
• Chemistry
• englisg
• geography
• Education,Zoology
• Physics

Authors

• newman
• Rout R.N
• K.N,Upadhyaya
• Pattanayak
• bhagat and others
• Palmen , Penkins
• Harry
• Sahu K.C
• O.P
• Ahuja , hl.