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  1. Review of Bacillus thuringiensis var. kurstaki (Btk) for use in forest pest management programs of Ontario - with special emphasis on the aquatic environment / by G.A. Surgeoner and M.J. Farkas.
    By: Surgeoner, Gordon A. - Farkas, Martha Judit, - Ontario.
    Publication info: Guelph, Ont. :Dept. of Environmental Biology, University of Guelph,[1989].
    Contributed by: Ontario Ministry of the Environment (archive.org)
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  2. Review of lecontvirus : a nuclear polyhedrosis virus with special emphasis on the aquatic environment : report / prepared by G.A. Surgeoner, M.J. Farkas.
    By: Farkas, Martha Judit, - Surgeoner, Gordon A.
    Publication info: [Ontario] :Ministry of the Environment,1990.
    Contributed by: Ontario Ministry of the Environment (archive.org)
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