Williams, Alan 3. Scores of Northern Voices Opera Project songs Scores of the 4 songs in the Northern Voices Opera Project opera;Music Composition;Music Performance 2019-03-29
    https://salford.figshare.com/articles/dataset/3_Scores_of_Northern_Voices_Opera_Project_songs/7908710
10.17866/rd.salford.7908710.v1