Categories

• Economic
• Others,English
• Botany,Zoology
• Others,odiya
• Biology
• Others,Biology
• Computer Science
• Environmental Studies
• Sanskrit
• enviromental studies

Authors

• Carr
• ramsay cobden
• Rao, ENR
• Piodyck
• H.L,Ahuja ,Singh,Singh
• Goel , k.v., k.a. and sastri
• Das D
• harich
• Arora C.C.
• p.b.