Where are prices for North Dakota Crude published?
I don't think it is the same as NYSE or is it?
Do all companies get the same price on a specific day or how are prices set?
Here's a website
Go to the customer center tab and you should be able to find your way around for that.
The Williston Daily Herald (under the stock market section) publishes a ND Sweet and ND Sour Crude price also. I don't know any more than this except that ND Sweet Crude, although the BEST there is, runs $10 or more below prices shown for Texas Crude, which I believe is used on the NYSE