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  1. Crayfish species assemblages in softwater lakes in seven tertiary watersheds in south-central Ontario / report prepared by S. M. David ... [et al.].
    Publication info: [Toronto] :Ontario, Ministry of Environment and Energy,1997.
    Contributed by: Ontario Ministry of the Environment (archive.org)
    Subjects: Crayfish  Effect of water quality on  Ontario, Southern  
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  2. Systematic ichnology of the Late Ordovician Georgian Bay formation of southern Ontario, eastern Canada /
    By: Stanley, D. Christopher A. - Pickerill, R. K. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,c1998.
    Contributed by: Royal Ontario Museum (archive.org)
    Subjects: Ichnology  Ontario, Southern  Ordovician  Paleontology  Trace fossils  
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