[Trombone-l] assistance finding composition dates

[Keith Brown]

Hello,

I'm in the process of writing a few papers and am having trouble finding
a few dates of compositions.  Any help would be much appreciated.

Tom Dossett - Trilogy for Bass Trombone (I have an early version of this
with a pink cover from Hickeys back in early 1999 - the piano part which
I have readily available has no date of composition or copyright info)

Culver - Suite for Bass Trombone Solo (I have the piece but couldn't
find the composition date on my copy - maybe I just missed it)

Pederson - Blue Topaz  (don't own it and local library doesn't have a
copy of it)

Thanks in advance for any help you can provide,

Keith