Halpern's unpublished notes are currently housed at the University of California, Berkeley.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 notes are currently stored at the University of California, Berkeley. Robert L. Oswalt, who authored a grammar of the connected Kashaya (Southwestern Pomo) language, started to gather Southern Pomo data roughly twenty years after Halpern's fieldwork.