Verbatim text: Small, E. 1980. The relationships of hop cultivars and wild variants of Humulus lupulus. Canad. J. Bot. 58: 676-686.
Author: Small, E.
Year: 1980
Title: The relationships of hop cultivars and wild variants of Humulus lupulus
Journal: Canad. J. Bot
Volume: 58
Pages: 676–686