Verbatim text: Gillett, J. M. and N. K. B. Robson. 1981. The St. John’s worts of Canada (Guttiferae). Publ. Bot. (Ottawa) 11: 1–40.
Author: Gillett, J.M., Robson, N.K.B.
Year: 1981
Title: The St. John’s worts of Canada (Guttiferae)
Journal: Publ. Bot. (Ottawa)
Volume: 11
Pages: 1–40