%0 Journal Article %A Alling, Norman L. %A Swartz, Timothy A. %T Monomorphisms of inductive number systems %J Portugaliae mathematica %D 1990 %P 293-308 %V 47 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1990__47_3_115719/ %G en %F PORMA_1990__47_3_115719