Hi Diane, I looked through all the cemetery listings that I could find on line but didn't find Rosina.
Where she was buried might be included in her obituary. You can request a copy of her obituary from Random Acts Genealogical Kindness. Go to raogk.org/oregon2.htm, read guidelines, choose Oregon, choose Klamath Co and Terri.
If that doesn't work out, contact the Klamath Basin Genealogy Society, www.rootsweb.ancestry.com/~orkbgs/ . Successful Searching!