Barkbeetles of the genus dendroctonus
Hopkins, A.D.
Barkbeetles of the genus dendroctonus - Washington 1909 - 1-169 p. - United States Department of Agriculture, Bureau of Entomology. Bulletin No. 83 Part I .
Barkbeetles of the genus dendroctonus - Washington 1909 - 1-169 p. - United States Department of Agriculture, Bureau of Entomology. Bulletin No. 83 Part I .