“Rotula Arithmetica”的意思、由来-开放百科全书

词条	Rotula Arithmetica
释义	SeeGeorge Brown (inventor)
随便看	List of members of the Virginia House of Burgesses List of Members of the Walloon Parliament List of membranophones by Hornbostel–Sachs number List of Memorial Cup champions List of memorials to Jefferson Davis List of memorials to John F. Kennedy List of memorials to the Great Famine List of Memorial University of Newfoundland people List of Memphis Beat episodes List of Memphis Grizzlies head coaches List of Memphis Grizzlies seasons List of Memphis Pharaohs seasons List of Men At Work band members List of Men at Work band members List of Menegazzia species List of menhirs List of Men of a Certain Age episodes List of men's footballers with 50 or more international goals List of men's grand slam tennis champions List of men's major championships winning golfers List of men's national association futsal teams List of men's national football (soccer) teams List of men's national football teams List of men's national futsal teams List of men's Olympic ice hockey players for Canada

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。