Papers of Gustav Holst including music manuscripts, published music, libretti, correspondence, engagement diaries, notebooks, lecture notes, contracts, and lists of compositions.
56 boxes
Gustav Holst: the man and his music by Michael Short, OUP, 1990
A Thematic Catalogue of Gustav Holst's Music, by Imogen Holst, Faber Music, 1974
Gustav Holst, A Biography by Imogen Holst , 2nd ed., OUP, 1969 (first publised 1938)
Archive
https://www.bpacatalogue.org/archive/HOL-1