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TemplateData for Sfn
Last name of first (or only) author
Year for citations with one author, or last name of second author for citations with two or more authors
Year for citations with two authors, or last name of third author for citations with three or more authors
Year for citations with three authors, or last name of fourth author for citations with four authors
Year for citations with four authors
Page number in source.
Page numbers in source.
Location in source