00453nam a22001817a 450000500170000002000180001704100130003508200150004810000190006324500370008226000430011930000100016265000130017270000210018570000190020670000260022570000200025120260624140355.0  a9789937760423  aEnglish   a570bSHA-p  aShakya, Madan   aPrinciples of biology grade xii   aKathmandu bAsmita Publications c2082  a604p.  aScience   aMehta, Kripa Ram  aGautam, Madan   aPokharel, Keshab Raj   aKhanal, Keshab