Editor's Preface, Jun. 1981

This 28-year index replaces the recently published 27-year index. After its receipt, a dozen or more authors reported to our editor that citations of some of their publications were missing. An investigation revealed that a number of citations had in fact been dropped due to a bug in the computer program. As a result, the IEEE Publishing Services Department graciously offered to republish the index at no cost to the MTT-S except for the cost of adding the 1980 citations, which were included to increase the usefulness of the index and to clearly identify the corrected version. It is suggested that upon receipt of this corrected enlarged index, the 27year index (Part II of the November 1980 issue) be discarded.