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As you read, you'll come across references to other work that can inform your presentation. Looking a promising title up using the citation information is a great strategy.
Put the title of an article into the Library Articles + Books search or Google Scholar (e.g., "Chronic toxoplasma infection modifies the structure and the risk of host behavior") and check for full text.
Locate and access peer-reviewed journal articles and other scholarly sources. For access to FindIt off campus or on wireless devices add the University of Minnesota Duluth to your Library Links in the Google Scholar settings.