It looks like this is your first post. More information will help other people find more for you. First, although he is buried in Pipstone County, it looks like he lived mostly in Murray County, so I would recommend posting a message on that boardhttp://boards.rootsweb.com/localities.northam.usa.states.min...
When you do post, include as much information as you have, including any birth, marriage or death dates you know. That will help narrow down the right family. You can search for census records for free here:www.familysearch.org
They also have Minnesota state censuses at that site. I could not find the family in 1900 - do you know where they were?
You can also search these sites in Minnesota