Dunn, C. E., Adcock, S..,,,,,,,,,,,,, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , .  . . ? and Spirito . ? ? .? .? .? . ? . ? W. A . . ? Reconnaissance Biogeochemical Survy Southeastern Cape Breton Island Nova Scotia, Part 1 - Black Spruce Bark (d. File 2558.), Geological Survey Canada Nova Scotia,Canada.
Dunn, C. E., Adcock, S. W., and Spirito, W. A. (1992). Reconnaissance Biogeochemical Survey Southeastern Cape Breton Island Nova Scotia, Part 1—Black Spruce Bark (File 2558), Geological Survey Canada, Nova Scotia, Canada.