1. Add MS 64490-64514 Reference (shelfmark): Add MS 64490-64514 Title: Works with opus number Collection Area: Music Collections Languages: English Date Range: [1947-1981] Extent: 25 items
2. Add MS 64515-64523 Reference (shelfmark): Add MS 64515-64523 Title: Orchestral works without definitive opus number Collection Area: Music Collections Languages: English Date Range: [1931-1951] Extent: 9 items