This transcribed article (allegedly from a 1990's fanzine titled _Freaks_):
http://orgoneresearch.com/2009/10/19/th ... re-in-ice/
... gives an interesting account of the Minnesota Iceman story from the perspective of sideshow entertainment folks. If one accepts this version of the story line (Hansen created the Iceman as a sideshow artifact from the beginning) it's easy to understand how Sanderson's and Heuvelmans' publications caused Hansen to withdraw the exhibit for a while.
This article includes photos reproduced from earlier publications.
Most interestingly, this article includes photos demonstrating the Minnesota Iceman (originally promoted as "The Siberskoye (Siberian) Creature") first appeared in a print publication in a 1967 issue of _Amusement Business_ (a trade magazine for circus, carnival, and other outdoor entertainment activities).