==A question about other US pop charts== 
 I'm very aware that the Billboard charts are now the "standard" US charts, but also that in earlier decades there were other charts produced by Cash Box, Variety etc.  We have the Whitburn books for Billboard, but do any tabulations of these alternative charts exist, and if so, where ?  The reason I ask is that, in writing the article on Julius Dixson, I got into correspondence with his son, who among much else wrote  "I will say this much, the Variety Charts were a more prestigious chart than Billboard.  It was already 49 years old by 1955.  It only had one main chart when it came to record sales.  The bottom line, who is selling the most records out of the top 25.  So whether you were Black or white it didn't matter.  It was much harder to get on that chart.  Billboard came late and had to compete with Variety so it needed to split the music up and create distinction.  Hence, you got more people on the charts and people were more interested if they had an opportunity to get notoriety. "Dim Dim The Lights" being # 10 on Variety is more important than it being #11 on Billboard back then.  The top ten in Variety is not the same as the top ten in Billboard during the time "...the lights" were on the charts.  Some of the latter could not make Variety's Top ten."  When there were strong differences between the different charts, what were the reasons ?  Has anything been written up on this ?  Any advice would be gratefully received.