顏正直

點線圖及其用途 / by: 顏正直; Ore, Oystein; 俄 ((Ore, Oystein)) (Language materials, printed)

群及其點線圖 / by: 郭羅斯曼 ((Geossman, Israel)); 馬格努思 ((Magnus, Wilhelm)); 顏正直; Geossman, Israel; Magnus, Wilhelm (Language materials, printed)

選擇的數學 : = 計算不用一個一個數 / by: 尼文 ((Niven Ivan)); 顏正直; Niven, Ivan (Language materials, printed)

五十道有挑戰性的或然率問題附解答 / by: 莫斯特勒; 顏正直 (Language materials, printed)