The spruce budworm and larch sawfly. Lecture Hewitt, C. Gordon (Charles Gordon), 1885-1920 creator Canadian Forestry Convention (Quebec City, Que.) 1911- contributor text book Kingston British whig publishing co., limited 1911 1911
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ENG Sawflies Spruce budworm SB945.S7 H5 https://www.biodiversitylibrary.org/bibliography/46726 11028507 10.5962/bhl.title.46726 DLC