00799nam0-22002891i-450-99000100865040332120040517160235.0000100865FED01000100865(Aleph)000100865FED0100010086520020001d--------km-y0itay50------baengNotes on categories and groupoidsPhilip J. HigginsLondon [etc.]Van Nostrand Reinhold1971AlgebraTeoria delle equazioniCalcolo vettoriale512Higgins,Philip J.47754ITUNINARICAUNIMARCBK99000100865040332110-102F7727FI1FI1Notes on categories and groupoids354806UNINA