Categories

• Economics
• Hindi
• Others,Physics
• Environmental Studies
• enviromental studies
• Others,Education
• Zoology,odiya
• Chemistry
• Biology
• Ethics and Values

Authors

• S.L,Sikri,Gupta, D.C
• R.N,Tagore
• hin
• Beckor ,Ktensmaith , Hardin
• Amitav
• Bahsabramaian
• brijlal and subramayam,Acharya , singh and jena
• q.d.
• isranal, s.m.,isranal, s.m.
• Bijaya Kumar A.