Biology and control of the douglas-fir beetle in the interior of British Columbia
Walters, J.
Biology and control of the douglas-fir beetle in the interior of British Columbia - Ottawa 1956 - 11 p. - No. 975 Canada Department of Agriculture Publication .
Biology
Douglas-Fir Beetle
Biology and control of the douglas-fir beetle in the interior of British Columbia - Ottawa 1956 - 11 p. - No. 975 Canada Department of Agriculture Publication .
Biology
Douglas-Fir Beetle