00293nam a2200109Ia 4500008004100000082001700041100001700058245004800075260002500123300001300148650002200161240817s9999    xx            000 0 und d  a001.642 k965  aUllman, J.D. 0aFundamental Concepts of Programming Systems  c1976b Addiso-Wesley  a328p. p.  a Computer Science