00350nam a2200121 a 450000500170000002000150001708200190003210000230005124500390007426000300011330000190014349000660016220251203092008.0  a0849339839  a512.7,bD, mol  aMollin, Richard A.  aQuadratics, Richard A. Mollin, eng  aNew York, CRE Pressc1996  axx,387p.c22cm  aCRC press series on Discrete mathematics and its applications