I apologize if you are already aware of this resource.

NDSU has a ND Biography Index at which is what allowed me to know where to look in my history books for your family surnames. You can order biographies from this website and they usually send a copy in pdf format via email within a few days.

Their site is:
http://library.ndsu.edu/db/biography/

Specifically, I want to point out that a pioneer biography file exists for Fritz Grube. It usually is several pages long & an excellent addition to any family history. If you don't already have this file, I strongly encourage you to consider getting it.

The information that I gave on your surname relates to that family grouping only. If you want all the family references in those resources, I will certainly post all that information also. I didn't want to possibly overwhelm you with all this information at one time.