Hi Michele, in 1930 Christina and her children were living in St. Joseph. Christina, b. MO, 58, widow, married 31 yrs, no occupation shown; Mary, b. MO, 25, single, general office work plumbing shop; Christina K., b. MO, 22, general office work dept. store; Philomena b. MO, 20, assistant bookkeeper wholesale dry goods; William, b. MO, 18, clerk hat shop.
Since the 1930 Census is the last one viewable by the public at this time, it's more difficult to gather info about families after that date. I'd contact Oregon Genealogical Society & Research Library, http://www.rootsweb.com/~orlncogs/ogsinfo.htmhttp://www.rootsweb.com/~orlncogs/ogsinfo.htm. Successful Hunting!