Michael M Casler Michael M. Casler, a former park ranger with the National Park Service, currently works as an independent historical researcher. Casler is the author of Steamboats of the Fort Union Fur Trade (1999) and editor of The Original Journals of Charles Larenteur (2007). He has also written numerous articles on the Upper Missouri fur trade. Read More Read Less
An OTP has been sent to your Registered Email Id:
Resend Verification Code
