Dear Ray,

Here are some websites that at first glance hold information for you on your Zeeb ancestors. Happy Searching!

South Dakota Birth Records over 100 years (several Zeeb's are listed)
http://apps.sd.gov/applications/PH14Over100BirthRec/index.as...

Land Records-
http://www.glorecords.blm.gov/

South Dakota Genweb(Some of the links are broken but can also be found at the South Dakota Historical Society also)
http://sdgenweb.com/

South Dakota Historical Society for Genealogists
http://history.sd.gov/Archives/genealogists.aspx