"ke" . "Ai ke fu" . "艾可夫" . "(Ackoff, Russell Lincoln, 1919- ) ke Ai ke fu" . "(Ackoff, Russell Lincoln, 1919- ) 艾可夫" . "Ai ke fu (Ackoff, Russell Lincoln, 1919- )" . "艾可夫 (Ackoff, Russell Lincoln, 1919- )" . . . .