Highly trained, fully employed classical musician whose musical discipline calls for the Big Rep. Refer to this volume constantly. It needs to be reissued, updated, etc. There is a companion volume of 8,000 Opera and Song themes by the authors equally as valuable. This type of reference is desperately needed by the working musical public. There are theme books for certain composers, and there are things like the Schwann and discography books, but nothing like this. Yes, there are certain omissions, but it is probably as comprehensive as it could be without weighing a ton or being completely unmanageable. God bless the authors, they performed a most valuable service.