There was some further information at Dick Oakes' <<https://socalfolkdance.org/master_teachers.htm|Folk Dance Master Teacher Biographies>>:

- <<https://socalfolkdance.org/master_teachers/wallin_j.htm|Joe Wallin's Biography>> by Dick Oakes
- The Biographies had been hosted at phantomranch.net in the past before they moved to socalfolkdance.org. A copy can still be found through the <<https://web.archive.org/web/20160320185737/http://www.phantomranch.net/folkdanc/teachers/wallin_j.htm|Internet Archive>>