Reference:Pennell1934a
Verbatim text: Pennell, F. W. 1934b. Castilleja in Alaska and northwestern Canada. Proc. Acad. Nat. Sci. Philadelphia 86: 517–540.
Author: Pennell, F.W.
Year: 1934b
Title: Castilleja in Alaska and northwestern Canada
Journal: Proc. Acad. Nat. Sci. Philadelphia
Volume: 86
Pages: 517–540
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