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我国外国钱币收藏界无人不知美国克劳斯出版社 (ＫｒａｕｓｅＰｕｂｌｉｃａｔｉｏｎｓ,ＫＰ :70 0Ｅ .ＳｔａｔｅＳｔｒｅｅｔ,Ｉｏｌａ ,ＷＩ 5 4990 - 0 0 0 1)和《世界硬币标准目录》 (ＳｔａｎｄａｒｄＣａｔａｌｏｇｏｆＷｏｒｌｄＣｏｉｎｓ,ＳＣＷＣ)。克劳斯出版社创
No one knows about the foreign coin collection industry in China. Krause Publications, KP: 70E. State Street, Iola, WI 5 4990-0001 and Standard Catalog of WorldCoins (SCWC). Klaus Press