Vols. for <May 1984>-Dec. 1986/Jan. 1987 cover the United States, Canada, and Mexico; for Feb./Mar. 1987-Apr./May 1988 cover United States and Canada; for Jun./Jul. 1988- cover United States, Canada, and Mexico.
Description based on: Vol. 10, no. 8 (May 1984); title from cover.
Published: K-111 Directory Corp., 1992-