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By: Gibson, Arthur, - Twinn, C. R. (Cecil Raymond)Edition:Publication info: [Sainte-Marthe-sur-Le-Lac, Abbaye Sainte-Marie-des-deux-Montagnes, [s.d.]Volume:Series:Holding Institution: Agriculture and Agri-Food Canada (AAFC)Subjects:BHL Collections:
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By: Gibson, Arthur, - Twinn, C. R. (Cecil Raymond)Edition: Rev.Publication info: Ottawa, Minister of Agriculture, 1931Volume:Series:Holding Institution: Agriculture and Agri-Food Canada (AAFC)Subjects:BHL Collections:
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By: Twinn, C. R. (Cecil Raymond) - Canada. Department of Agriculture.Edition:Publication info: Ottawa, Canada Department of Agriculture, 1956Volume: 969Series:Holding Institution: Agriculture and Agri-Food Canada (AAFC)Subjects:BHL Collections:
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By: Twinn, C. R. (Cecil Raymond) - Canada. Department of Agriculture. Science Service.Edition:Publication info: Ottawa, Canada Department of Agriculture, 1956Volume: 972Series:Holding Institution: Agriculture and Agri-Food Canada (AAFC)Subjects:BHL Collections:
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By: Twinn, C. R. (Cecil Raymond) - Canada. Division of Entomology.Edition:Publication info: Ottawa, Ministère de l'agriculture du Canada, Service des sciences, Division de l'entomologie, 1957Volume:Series:Holding Institution: Agriculture and Agri-Food Canada (AAFC)Subjects:BHL Collections:
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By: Twinn, C. R. (Cecil Raymond) - Peterson, D. G. - Canada. Department of Agriculture.Edition:Publication info: Ottawa, Science Service, Entomology Division, Canada Dept. of Agriculture, 1955 (1958 printing)Volume:Series:Holding Institution: Agriculture and Agri-Food Canada (AAFC)Subjects:BHL Collections: