AndersonRodriguesITT / Croppie andresDarriens / Croppie andygoo / Croppie andypayne / Croppie aneudyac / Croppie anhallbe / Croppie anil3a / Croppie anit-sindhu / Croppie ankitjain28may / Croppie Ant000228 / Croppie anuragsoniSYN / Croppie ...
^ Rodrigues BA (1975). "Smallpox eradication in the Americas". Bulletin of the Pan American Health Organization. 9 (1): 53–68. PMID 167890. ^ a b c Fenner F, Henderson DA, Arita I, Ježek Z, Ladnyi ID (1988). "Chapter 9: Development of the Global Smallpox Eradication Programme...