00357nam a2200133Ia 4500082002000000100001800020245003600038260003400074300001600108490001700124500004800141500000500189700002900194 a515.35bG577.DS aGodbillon, C. aDynamical systems on surfacesb aBerlinbSpringer-Verlagc1983 a201p. Bibl. aUniversitext a"Tr. from the French by H. G. Helfenstein". a aHelfenstein, H. G. ; tr.