00366nam a2200121Ia 4500082002200000100002300022245006900045260003300114300002300147500004700170500000500217700002200222  a519.134bSi595.PO  aSimon, Jean Claude  aPatterns and operators; the foundations of data representationb  aLondonbAcademic Pressc1986  a212p. Index, Bibl.  a"Translated from the French by J. Howlett"  a  aHowlett, J. ; tr.