Verbatim text: Les, D. H. and R. L. Stuckey. 1985. The introduction and spread of Veronica beccabunga (Scrophulariaceae) in eastern North America. Rhodora 87: 503–515.
Author: Les, D.H., Stuckey, R.L.
Year: 1985
Title: The introduction and spread of Veronica beccabunga (Scrophulariaceae) in eastern North America
Journal: Rhodora
Volume: 87
Pages: 503–515