Reference:Dugle1966a
Verbatim text: Dugle, J. R. 1966. A taxonomic study of western Canadian species in the genus Betula. Canad. J. Bot. 44: 929--1007.
Author: Dugle, J.R.
Year: 1966
Title: A taxonomic study of western Canadian species in the genus Betula
Journal: Canad. J. Bot
Volume: 44
Pages: 929–1007