Here's another magazine you guys may be interested in looking at.
Below is how American Radio History described CASH BOX magazine.
Cash Box is a defunct music industry trade magazine that was published weekly from July 1942 to November 1996.
Cash Box was one of several magazines that published record charts in the United States. Its most prominent competitors were Billboard and Record World (known as Music Vendor prior to April 1964). Unlike Billboard, Cash Box initially combined all currently available recordings of a song into one chart position with artist and label information shown for each version, alphabetized by label.
Originally, no indication of which version was the biggest seller was given, but from October 25, 1952, a star was placed next to the names of the most important artists. Cash Box also printed shorter jukebox charts which included specific artist data beginning in the spring of 1950.
Separate charts were presented for juke box popularity, record sales, and radio airplay, similar to Billboard's methodology prior to August 1958, when Billboard debuted its "Hot 100," which attempted to combine all measures of popularity into one all-encompassing chart. In addition, Cash Box published chart data for specific genres, such as country music and R&B music.
http://www.americanradiohistory.com/Cash-Box-Magazine.htm