Mathematical Circles: Russian Experience (Mathematical World, Vol. 7)
A Moscow Math Circle: Week-by-Week Problem Sets (MSRI Mathematical Circles Library) (MSRI Mathematical Circles Library, 8)
A Decade of the Berkeley Math Circle: The American Experience (MSRI Mathematical Circles Library) (v. 1) (MSRI Mathematical Circles Library, 1)
American Mathematical Society Circles: (Russian Experience)
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