Categories

• Chemistry,odiya
• zoolozy
• History
• Economics
• Botany
• enviromental studies
• geography
• Botany,Physics
• Environmental Studies
• Zoology

Authors

• Das , b.c., h.h. and chaudhury
• Raut
• Biray.U
• beck
• D.,lindley
• kreyszig
• km
• Wrenn C.L,Eliot George
• Dickery
• R.,Samson