Patti Reagan Davis joins group opposing A-testing

President Reagan's younger daughter, Patti Davis, has joined a California campaign seeking to halt nuclear weapons testing. But she says she's trying not to turn the issue into a father-daughter dispute.

''I don't want to get into a battle with my father on this,'' Miss Davis said at a celebrity rally sponsored by Californians for a Bilateral Nuclear Weapons Freeze, a group seeking to put the issue on the state ballot next November.