Hamm PB, Hansen EM. Phytophthora pseudotsugae, a new species causing root rot of Douglas-fir. Can. J. Bot. [Internet]. 1983  ;61:2626?2631. Available from: http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=eng&journal=cjb&volume=61&year=1983&issue=10&msno=b83-289