#(define toplevel-music-handler collect-music-for-book)
#(define toplevel-score-handler collect-scores-for-book)
#(define toplevel-text-handler collect-scores-for-book)
#(define toplevel-music-handler collect-music-for-book)
#(define toplevel-score-handler collect-scores-for-book)
#(define toplevel-text-handler collect-scores-for-book)