Categories

• pyschology
• Others,Physics
• Physics,History
• Education,Zoology
• Others,Biology
• IT
• Environmental Studies
• Politicalscience
• Botany,Physics
• zoolozy

Authors

• B.C,Theraja
• Das , H.K.,Nayak, k.
• Popp M.S
• v. and others
• Gould Edward , Lwear
• meier
• Seth, m.l.,Seth, m.l.
• Kotpal, sastri and shukla,Sharma, barik and das
• Langsam
• N.N.