A selection of sample literature reviews are listed below.
They are broad in scope, but will be helpful as a reference point or for you to obtain a few ideas regarding the structure of a review.
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The evolution of mathematics support: a literature review
Parkinson's disease and occupational exposures: a systematic literature review and meta-analyses
Employment Among Current and Former Welfare Recipients: A Literature Review
Considering the Environment in Transportation Planning: Review of Emerging Paradigms and Practice in the United States