00404nam a2200133Ia 4500020001800000082002000018100004200038245003000080260005200110300002600162490004600188500000500234700003100239  a9780821887141  a515.72bOu93.MD  aOuterelo, Enrique and Ruiz , jesus M.  aMapping degree theory  b  aProvidencebAmerican Mathematical Societyc2012  ax, 244p. Bibl. Index.  aGraduate studies in Mathematics v v. 108  a  aRuiz , jesus M ; jt. auth.