Foliage insects of spruce in Canada.
Contributors: Brown, A. W. A. 1911-; Canada. Dept. of Agriculture.
Series: Publication -- no. 712.; Technical bulletin -- 31; Publication (Canada. Dept. of Agriculture) -- no. 712.; Technical bulletin (Canada. Dept. of Agriculture) -- no. 31.
Published: 1941
Language: eng
Number of pages: 29
Subjects: Spruce -- Diseases and pests.