On USGENWEB>WI>Barron>Barron County Links (near bottom of page)
Search the following for Dabruzzi:
1. Counry Court Record Index (found some naturalization rec)
2. Newspaper Index (found Caroline's death)
3. Rice Lake Public Library>DB>Gen. & Local Hist.. L.E. Phillips (found both Caroline and Frank)
4. WI Vital Rec. (near bottom of page) (found Caroline)
Anything you find on WI Vital Rec can be ordered online.
Know you can order newspaper index at http://www.uwstout.edu/lib/archives/arc_research.cfm
You may be able to order the other three listed, too. However you will need all info you find...date of pub., locations, Series, etc.
Fill out form and submit.