Thanks to Latvian, I see I have made some errors, I hope it is OK to quote your corrections, Latvian:
" the Gutche Concerto is his Piano Concerto, Op. 24 (published in 1955), and the performers are Bernhard Weiser, piano, with the University of Minnesota Summer Session Sinfonietta, probably led by James Alferis. Not sure who Oliveros might be.
- the Schuman recording is most likely Donald McInnes, viola, with the Camerata Singers and the NY Philharmonic led by Leonard Bernstein. I know of no other recording of this work (unless what you have is a live performance by someone else?)
- the 6th Symphony in your Swanson upload is actually Charles Jones' 6th Symphony -- I'm familiar with that LP.
- the recording of Night Music with Mitropoulos is currently available on a Deutsche Grammaphon CD reissue."
and I will remove the Night Music from the file. Sorry for the inconvenience, Arbuckle