The spruce budworm and larch sawfly lecture delivered by Dr. C. Gordon Hewitt, F.E.S., Dominion entomologist at the Canadian Forestry Convention, city of Québec, 19th January, 1911
The spruce budworm and larch sawfly lecture delivered by Dr. C. Gordon Hewitt, F.E.S., Dominion entomologist at the Canadian Forestry Convention, city of Québec, 19th January, 1911.