Here are some other recommended online resources
Special Collections (for University, Unique Music & Digitized Collections)
Mississippi River Festival (1969-1980) (SIUE Archives site with film footage, performer indexes & more)
Music Events in the Area LibGuide (for SIUE, Local, and St. Louis music events & performances)
Here are a few other important and helpful reference resources:
Complete Works of Composers (critical, scholarly editions of major music composers) (MT 3 call number--in alphabetical order by composer's last name.) (3rd floor, northeast side--near the music CDs).
The New Grove Dictionary of Music & Musicians (Music ML100.N48 2001)
Doctoral Dissertations in Musicology (ML128.M8 A4).