[Chicago, Ill]: Advertising Publications, inc
Weekly, except 1st, 3rd & 5th week of July, 2nd & 4th week of Aug., 3rd week of Nov., and 4th week of Dec.
Began in 1930. Print discontinued July 2023
Volume and number appear only in colophon with <2018->
Some issues accompanied by computer discs.
Description based on: Vol. 44, no. 45 (Nov. 5, 1973); title from caption.
Semimonthly Jan.-Apr., June-July, and Sept.-Dec.; 3 times per month in May; monthly in Aug.
Latest issue consulted: Vol. 96, no. 1 (March 17, 2025).