An online index can be found here:
http://www.accessgenealogy.com/native/finalindex.php
The index will return the roll and page # as well as the tribal designation.
The Family History Library in Salt Lake looks like it has book and a microfilm copy.
Here is a link for the call # for the film: http://www.familysearch.org/eng/library/fhlcatalog/supermainframese...++
See also:
https://wiki.familysearch.org/en/Five_Civilized_Tribes
--Randy