References:
Verschoor, K. van R. 1974. Paleobotany of the Tertiary (early Middle Eocene) McAbee Beds, British Columbia. M.Sc. thesis, University of Calgary, Calgary, AB, 128 p.
Link: Richard M. Dillhoff, Estella B. Leopold, and Steven R. Manchester (2005): The McAbee flora of British Columbia and its relation to the Early–Middle Eocene Okanagan Highlands flora of the Pacific Northwest. Can. J. Earth Sci. 42: 151–166.
Greenwood, D.R.; Pigg, K.B.; Basinger, J.F.; DeVore, M.L. (2016). "A review of paleobotanical studies of the Early Eocene Okanagan (Okanogan) Highlands floras of British Columbia, Canada and Washington, USA". Canadian Journal of Earth Sciences. 53 (6): 548–564. doi:10.1139/cjes-2015-0177.
Link: Alex Lowe ,Christopher K. West, Markus Sudermann, and David Robert Greenwood (2017): MILLENNIAL-SCALE PLANT COMMUNITY AND CLIMATE DYNAMICS AT THE ONSET OF THE EARLY EOCENE CLIMATIC OPTIMUM, MCABEE FOSSIL BEDS, BRITISH COLUMBIA, CANADA. Conference: Geological Society of America Annual Meeting At: Seattle, Washington, USA