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The various indexes published by the H.W. Wilson Company are now helping a fourth generation of library users to find articles in hundreds of periodicals and journals. One Wilson index in particular, the Social Sciences Index (SSI), has undergone major revamping in recent years. It was originally called the International Index (1907–1965). In April, 1965 it became the Social Sciences and Humanities Index; then in April, 1974 it split to form separate indexes for each area, simultaneously expanding the scope of coverage of both parts.