Verbatim text: Křísa, B. 1966. Contribution to the taxonomy of the genus Pyrola L. in North America. Bot. Jahrb. Syst. 85: 612–637.
Author: Křísa, B.
Year: 1966
Title: Contribution to the taxonomy of the genus Pyrola L. in North America
Journal: Bot. Jahrb. Syst
Volume: 85
Pages: 612–637