Uncle Dave, regarding Antheil's Trumpet Sonata, wounds me:

>and Thomas Stevens on a Crystal CD (665, the latter entry seems to have
>escaped the notice of >the Schwann Opus).

Gasp!  The horror!  So I checked...

In Schwann, Crystal 665 is listed under "Collections:Trumpet" under
"Stevens, Thomas" since it features works by more than seven composers.
Most (but not all) "missing" listings complaints are resolved by checking
the collections section of Opus.

Bob K.
Schwann