This should be a sticky...
  Where are you getting them?  They look a lot like the pics from the North American Ethnographic Collection Archives, but most I have never seen.
If anybody wants to, you can go to    anthro.amnh.org/anthropology/databases/north_public/north_public.html
Googling North American Ethnographic Collection will get you there, too.  You can search for bows by region.  The Arctic region has some fascinating styles.