00407nam a2200145 a 450000500170000002000150001708200190003210000140005124500610006526000360012630000200016249000430018270000180022570000180024320251203091826.0  a354054478X  a006.6,bD, ehr  aEhrig, H.  aGraph grammars and their application to computer science  aNew YorkbSpringer Verlagc1991  ax,703p.c23 cm.  aLecture notes in computer scienced532  aKreowski, HJ.  aRozenberg, G.