Biblio
“Mulching woody ornamentals with organic materials”, Oregon State University, Extension Service, 2009.
, “Improving garden soils with organic matter”, Oregon State University, Extension Service, 2003.
, “Growth, flowering and cold hardiness of Rockrose in western Oregon”, HortTechnology, vol. 20, no. 3, 2010.
, “Evaluation of Growth, Flowering and Cold Hardiness of ceanothus in Western Oregon”, HortTechnology , vol. 19, no. 2, 2009.
, “Mulching woody ornamentals with organic materials.”, EC 1629-E, 2009.
, “The other rockroses: Halimium and XHalimiocistus”, Pacific Horticulture, vol. 68, no. 2, 2007.
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