I am looking for an obituary or a burial record for Marie VALIN who is reported in her son's biographies to have died in 1897 in Yankton. Alternate spellings of the name are VOLIN (which is what the name became later), VOLEN, VOLLIN, etc. I suspect that she may have lived in or around Volin, since that is where her sons lived before they moved on to Rapid City. She was Catholic, so there may have been a catholic sacramental record. Any ideas on where to begin looking? Thanks for any help that you can provide.