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  1. By: Surgeoner, Gordon A. - Farkas, Martha Judit, - Ontario. Aquatic Criteria Development Committee.
    Publication info: Guelph, Ont. :Dept. of Environmental Biology, University of Guelph,[1989].
    Holding Institution: Ontario Ministry of the Environment (archive.org)
  2. By: Farkas, Martha Judit, - Surgeoner, Gordon A.
    Publication info: [Ontario] :Ministry of the Environment,1990.
    Holding Institution: Ontario Ministry of the Environment (archive.org)