Tuckerman,E 1850: Enumeratio lichenum a D. Prof. Agassiz ad Lacum Superiorem, anno 1848, lectorum. - In: Agassiz,L: Lake Superior: its physical character, vegetation, and animals, compared with those of other and similar regions. Gould, Kendall and Lincoln\Boston pp. 170-174. [Mattick Rec.# 30333] Keywords: USA