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2005-09-20 21:00 Tico 546×480×8 (11571 bytes) {{GFDL}} [[Frecuencia de aparición de letras]] en español. Creada usando datos de [[[[Frecuencia de aparición de letras]] y de '' Fletcher Pratt, Secret and Urgent: the Story of Codes and Ciphers Blue Ribbon Books, 1939, pp. 254-255''.
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