Encyclopedia of popular music
It has an entry for Bachman-Turner-Overdrive, but no Stompin' Tom. sigh
"Containing 27,000 entries and over 6,000 new entries, the online edition of the Encyclopedia of Popular Music includes 50% more material than the Third
Edition. Featuring a broad musical scope covering popular music of all genres and periods from 1900 to the present day, including jazz, country, folk, rap, reggae, techno, musicals, and world music, the Encyclopedia also offers thousands of additional entries covering popular music genres, trends, styles, record labels, venues, and music festivals. Key dates, biographies, and further reading are provided for artists covered, along with complete discographies that include record labels, release dates, and a 5-star album rating system."