%0 Journal Article %A Gilbert Baumslag %A Frank B. Cannonito %T Infinitely Generated Subgroups of Finitely Presented Groups.I. %J Mathematische Zeitschrift %D 1977 %P 117-134 %V 153 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1977__153_172485/ %F MZ_1977__153_172485