00774nam0-22002531i-450-990001151230403321000115123FED01000115123(Aleph)000115123FED0100011512320000920d1986----km-y0itay50------baengMobius Functions, Incidence Algebras and Power Series Representationsby DurBerlin [etc.]Springer-Verlag1986Lecture Notes in Mathematics1202Dur,Arne55036ITUNINARICAUNIMARCBK990001151230403321C-20-(12022324MA1MA1Möbius functions, incidence algebras and power series representations78565UNINAING01