Billboard (magazine) - Wikipedia
Canadian Billboard Hot 100, 10 October 2012 | Canadian Music Blog
Dave's Music Database: Billboard: Best Sellers, 1940-1958
Analyzing the Billboard Hot 100
List of Billboard number-one singles of the 1940s - Wikipedia
Chart Rewind: The Hot 100 in October 1958 – Billboard
Billboard Hot 100 50th Anniversary Charts | PDF | Singles (Music) | Music
Billboard Hot 100 Charts: The 2000s - Record Research
Dave's Music Database: Top 100 Songs from 1940-1949
List of Billboard number-one singles of the 1940s - Wikipedia
Billboard Pop Memories: 1940-1944 | eBay
Best Sellers in Stores…In 1940 | The Music Court
Billboard (magazine) | Ultimate Pop Culture Wiki | Fandom
The Complicated Black History Of Billboard's Hip Hop & R&B Charts | HipHopDX
Billboard Top Hits - 1948 - YouTube
Billboard Hot 100 | Ultimate Pop Culture Wiki | Fandom
Billboard's Hot 100 Chart Turns 60! Here Are 60 of the Most Awesome Accomplishments in Its History!
Most Popular Songs of All Time: Billboard Hot 100 Longest Ranking Hits – Billboard
Billboard's Hottest Hot 100 Hits, 4th Edition: Bronson, Fred: Amazon.com: Books
Billboard's Hot 100 Chart Turns 60! Here Are 60 of the Most Awesome Accomplishments in Its History!
The Chart Book – Billboard
From the Archives: Billboard Magazine's Many Faces, 1942-2014 – Billboard
Billboard Top 100 Chart of Every YearSince 1940
Billboard's Top 100 Songs of All Time - Musing on Music
America's Greatest Hits 1940-2015 - Record Research
