The
Salem Public Library will look up obits for you for a fee of five dollars. The local paper, Statesman Journal, will provide it online for a small fee as well. If you search under obits, then archives, you can get a couple lines of the obit for Dorothy for free, which lists her parents, at least.
You might try looking for your
Gronlund family in
Clackamas County, it looks like they lived around
Carver and
Oregon City. Also, search in the
Oregon Historical
Records Index at
http://genealogy.state.or.us/ That lists several naturalization records for Gronlunds.