00265nam a2200109 a 450000500170000002000150001708200180003210000190005024500340006926000340010330000180013720251203110106.0  a8176250511  a547.0076bDEL  aDelvin, Samuel  aProblems in organic chemistry  aNew DelhibSarup & Sonsc1999  a206p.c23 cm.