Introduced pine sawfly
Wilson, L.F.
Introduced pine sawfly - Washington 1971 - 1-4 p. - PIne United States Department of Agriculture, Forest Service. Forest Pest Leaflet No. 99 .
Introduced pine sawfly - Washington 1971 - 1-4 p. - PIne United States Department of Agriculture, Forest Service. Forest Pest Leaflet No. 99 .