Halpern's unpublished notes are currently housed at the University of California, Berkeley. Robert L. Oswalt, who wrote a grammar of the related Kashaya (Southwestern Pomo) language, began to collect Southern Pomo data approximately twenty years after Halpern's fieldwork.
Halpern's unedited records are currently preserved at the University of California, Berkeley. Robert L. Oswalt, who penned a grammar of the related Kashaya (Southwestern Pomo) language, began to collect Southern Pomo data around twenty years after Halpern's research.