00291nam a2200109Ia 4500082002300000100003900023245002800062260003400090300002100124500000500145700003100150  a518.5424PbC643.PP  aClocksin, W. F. and Mellish, C. S.  aProgramming in prologb  aBerlinbSpringer-Verlagc1981  axii, 279p. Index  a  aMellish, C. S. ; jt. auth.