Here's the dope we're looking for:
Victor sets:
M608 = 11 May 1939 M648 = 11 May 1939 M744 = 20 April 1940 M781 = 29 April 1940 M802 = 29-30 April 1940 M876 = 10 May 1941 M889 = 9 May 1941 M973 = 7 May 1942
Victor Singles:
2058 and 2059 = 11 May 1939 2112 = 29 April 1940 11-8302 = 7+8 May 1942 11-8349 = 8 May 1942
Columbia:
Hanson Piano Concerto = 19 December 1950 Grieg Holberg Suite = 19 December 1950
MacDowell/Hanson/Riegger = 30 April 1952
Regards,
Mike Gray