00000nam 2200000za 4500 9.700270 CaOODSP 20250527151634 cr ||||||||||| 150407r19581955oncao|||o f000 0 eng d CaOODSP eng n-cn--- A43-940/1955E-PDF Twinn, C. R. Control of black flies in Canada [electronic resource] / by C.R. Twinn and D.G. Peterson. Ottawa : Canada Department of Agriculture : Science Service, Entomology Branch, 1955 (1958 printing). 9 p. : ill. "Issued April 1955, Reprinted February 1958". Historical publication digitized by Agriculture and Agri-Food Canada. Issued also in French under title: La répression des mouches noires au Canada. 15-02-Supp 2015-02-16 Agricultural technology gcpds Crops gcpds Pesticides gcpds Peterson, D. G. Canada. Department of Agriculture. Canada. Division of Entomology. La répression des mouches noires au Canada (CaOODSP)9.644168 http://publications.gc.ca PDF 1079 KB https://publications.gc.ca/collections/collection_2015/aac-aafc/A43-940-1955-eng.pdf Publication 940