TY - JOUR A1 - Campbell, A. C. T1 - On the Solving jof Code Items Demanding the Use of Indirect Procedures JF - Warson, P. C., Johnson-Laird, P. N. (Eds.): Thinking and Reasoning, Harmondsworth (Penguin Books) 1968, pp. 225-233. Y1 - 1968 ER -