凱洛許

橢圓 / by: 凱斯勒; 凱洛許 (Language materials, printed)

直線. 平行線. 垂直線 = Straight Lines, Parallel Lines, Perpendicular Lines / by: 凱洛許; 安里柯.阿諾; 漢聲雜誌; 漢聲雜誌 (譯) (Language materials, printed)

一人,兩人玩的數學遊戲 = Mathematical Games for One or Two / by: 凱洛許; 洛依絲.艾勒特; 漢聲雜誌 (Language materials, printed)

橢圓 = The Ellipse / by: 凱洛許; 漢聲雜誌; 漢聲雜誌 (譯); 雷納德.凱斯勒 ((Kessler, Leonard)) (Language materials, printed)