Encylopaedia Britannica V.1 Encylopaedia Britannica V.2 Encylopaedia Britannica V.3 Encylopaedia Britannica V.4 Encylopaedia Britannica V.5 Encylopaedia Britannica V.6 Encylopaedia Britannica V.7 Encylopaedia Britannica V.8 Encylopaedia Britannica V.9 Encylopaedia Britannica V.Ⅰ