00298    a2200121   4500082001300000100001600013245004200029250001200071260004600083300001800129650001200147700001700159  a570bVER  aVerma, P.S.  aA text book of biologybfor class xii  a6th ed.  aNew DelhibS. Chand & Companyc1980g1991  ax,700p.c24cm  aBiology  aPandey, B.P.