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- [8] A SUCCESSFUL ERADICATION CAMPAIGN - GLOBAL ERADICATION OF SMALLPOX REVIEWS OF INFECTIOUS DISEASES, 1982, 4 (05): : 916 - 930
- [9] SMALLPOX - EMERGENCE, GLOBAL SPREAD, AND ERADICATION HISTORY AND PHILOSOPHY OF THE LIFE SCIENCES, 1993, 15 (03): : 397 - 420