Using state-and-transition models to project cheatgrass and juniper invasion in southeastern Oregon sagebrush steppe.
Proceedings of the First Landscape State-and-Transition Simulation Modeling Conference, June 14–16, 2011, Portland, Oregon. :73-84.
Historic vegetation of the Tualatin River Basin..
Exploring the Tualatin River Basin: a Nature and Recreation Guide.. :144.
Habitat Changes in the Region, 1850-2010.
Biodiversity Guide for the Greater Portland-Vancouver Region. :17-21.
Limbella and Platylomella.
Flora of North America. 28:317-319.