I just acquired 2 cm russell prints 20x20 or so, one is no. 350 Partners
right hand corner is 1969 aron ashley inc. yonkers ny and left hand corner is thomas gilcrease inst. Of american history and art tulsa, OK. Does anyone have any idea of the value or where would be the best place to find out? Thanks

Following are some information I was able to find regarding the artist and the Aaron Ashley group.
You might try at a local museum and get your painting appraised.

Catalogue of Fine Color Reproductions. by Aaron Ashley, Inc. : Alan Wofsy Fine Arts - Wittenborn Art Books : (http://www.art-books.com/cgi-bin/artbooks/54-0164)
Aaron Ashely - Bentley Publishing Group - Fine Art Prints - Fine Art Posters - Fine Art Publisher (http://www.bentleypublishinggroup.com/aaronashley/index.html)
Charles Russell - Images Charles Marion Russell (http://www.askart.com/AskART/artists/search/Search_Repeat.aspx?searchtype=IMAGES&artist=33337)