Fir engraver beetle, a serious enemy of white fir and red fir
Struble, G.R.
Fir engraver beetle, a serious enemy of white fir and red fir - Washington 1937 - 1-16 p. - Beetle United States Department of Agriculture. Circular No. 419 .
Fir engraver beetle, a serious enemy of white fir and red fir - Washington 1937 - 1-16 p. - Beetle United States Department of Agriculture. Circular No. 419 .