  We show that the strong coupling phase of the non-Abelian Thirring model is
dual to the weak-coupling phase of a system of two WZNW models coupled to each
other through a current-current interaction. This latter system is integrable
and is related to a perturbed conformal field theory which, in the large $|k|$
limit, has a nontrivial zero of the perturbation-parameter beta-function. The
non-Abelian Thirring model reduces to a free fermion theory plus a topological
field theory at this critical point, which should therefore be identified with
the isoscalar Dashen-Frishman conformal point. The relationship with the
Gross-Neveu model is discussed.
