Bibliografía (10 obras)
Introduction to California soils and plants
2005
Geology and Plant Life
2002
Genecology and ecogeographic races
1995
The Natural History of Puget Sound Country
1991
California serpentines
1984
Gardening with native plants of the Pacific Northwest
1982
Soil diversity and the distribution of plants, with examples from western North America
1969
Plant life on serpentinite and other ferromagnesian rocks in northwestern North America
Chromosome numbers in Compositae
1963
Variation in Fertility of Hybrids Between Isolated Populations of the Serpentine Species, Streptanthus Glandulosus Hook
1957
