TY - BOOK AU - Mihalik, Michael L ED - Tschantz, Steven T. TI - Semistability of amalgamated products and HNN-extensions T2 - Memoirs of the American mathematical society;no.471 SN - 0821825313 U1 - 512.2 PY - 1992/// CY - Providence,Rhode Islands PB - American Mathematical Society KW - Geometric group theory KW - HNN-extensions KW - Free products(Group theory) ER -