The descriptive note comes from item 1489 in :
Diamond, Harold J.
An annotated guide to the literature
New York: Schirmer Books, 1991, 716 p.
This is what Harold J. Diamond had to say:
Description and analytic breakdown of all the sections, with commentary on Copland's style. Musical examples and diagram.
© Harold J. Diamond
(c) 2013. Frank Greene. All rights reserved.