Perry David A, Lotan James E
Department of Forest Science, Oregon State University, Corvallis, Oregon, 97331.
Intermountain Forest and Range Experiment Station, Northern Forest Fire Laboratory, Missoula, Montana, 59801.
Evolution. 1979 Sep;33(3):958-968. doi: 10.1111/j.1558-5646.1979.tb04749.x.