Ips bark beetles in the south
Speers, C.F.
Ips bark beetles in the south - Washington 1971 - 1-7 p. - Beetles United States Department of Agriculture, Forest Service. Forest Pest Leaflet No. 129 .
Ips bark beetles in the south - Washington 1971 - 1-7 p. - Beetles United States Department of Agriculture, Forest Service. Forest Pest Leaflet No. 129 .