Sen, . Pure Science,Chemistry,Physics : brilliant Guide to W. B. school service commission examination / Sen & Sharma. - 7th ed / . - Kolkata : Benu Prakashani , 2008. - xvi, 588p. (In various pagings) : illus. ; 20cm . Note book of SSC NULL ISBN: RS150.00 (Pb) Subjects--Index Terms: PURE SCIENCE 2. CHEMISTRY 3. PHYSICS Dewey Class. No.: 540.76 / SEN/P