Three cross-searchable citation indexes - Science Citation Index Expanded (1900-present), Social Sciences Citation Index (1956-present), and Arts and Humanities Citation Index (1975-present). Searchable via the ISI Web of Knowledge. | Three cross-searchable citation indexes - Science Citation Index Expanded (1900-present), Social Sciences Citation Index (1956-present), and Arts and Humanities Citation Index (1975-present). Searchable via the ISI Web of Knowledge. |