Editor: 1973- J. L. Andriot ; <1999- >, Donna Andriot.
Vols. for 1973- issued in 2 or more parts; for 1980- issued in 2 parts, including vol. for current agencies (published annually) and vol. for non-current agencies (published quinquennially).
Edition for 1981 published in microfiche only.
Quarterly updating supplements are issued between editions.
