Browsing by Author "Helsing, Guy G."




TitleAuthor(s)Issue Date
Marine wood maintenance manual : a guide for proper use of Douglas-fir in marine exposuresMorrell, Jeffrey J., 1955-; Helsing, Guy G.; Graham, R. D. (Robert D.); Oregon State University. Forest Research LaboratoryOct-1984
Wood pole maintenance manual : inspection and supplemental treatment of douglas-fir and western redcedar polesGraham, R. D. (Robert D.); Helsing, Guy G.; Oregon State University. Forest Research LaboratoryFeb-1979