Categories

• Physics,History
• Economics
• Mathematics
• Others,History
• English
• evs
• Physics
• Education,Zoology
• Political Science,Zoology
• History

Authors

• k.b. and nayak
• Mansingh M.
• das and mohanty,fletcher and hickey
• m.g.,nayar
• N,Sewis
• Jha , R.
• S,Shrma
• r.c.,raychoudhury
• Poplawski, P.
• Lal H.