Template:Hale & Culberson, 1966
- Hale, M.E., Jr. & Culberson, W.L. 1966. A Third Checklist of the Lichens of the Continental United States and Canada. The Bryologist 69(2): 141–182. RLL List # 60 / Rec.# 7369 – Recent Literature on Lichens JSTOR DOI: 10.2307/3240509