Professor B.A.F. Wehrfritz has kindly drawn my attention to some errors in the above paper [1]. Principally, there is an invalid assertion of complete irreducibility used in Theorem 2.1 and its corollary. Thus the expression " 1-dimensional f-representation" should be replaced by "Abelian 6-representation" in both statements. This amended conclusion is still adequate for subsequent results. In ...