I have spent several weeks at the UNLV Special Collections, County Libraries, LV Historical Society, and LED Museum researching gaming history. They have a wealth of info on gaming.
Larry and I spent 3 days in Reno, 10 hours a day at Reno Gaming Control Board, Reno Library, Reno Historical Society, NV State Historical Archives in Carson City.

You can read the articles written at:
http://www.marlowcasinochips.com/links/genetrimble/genetrimble.htm
The Las Vegas Hacienda
Sal Sagev
Arrowdie - The 2nd to last paragraph says it all!!
Reno Card Room

All products of the above research places.
There is a wealth of info still in my notes. Enough to write a dozen more articles when I get around to it.