The first thing you need is her DD 214. Here is a link to get that.
http://www.archives.gov/veterans/mil...rvice-records/
then contact a PVA officer.
http://www.pva.org/site/c.ajIRK9NJLc...California.htm
Then call the 1-800 8271000 VA # to see if they will start your claim on the phone.