TY - JOUR A1 - Birch, H. G. T1 - Field Measurement in Nutrition, Learning, and Behavior JF - N. S. Scrimshaw and J. E. Gordon (Eds.), Malnutrition, Learning, and Behavior, Cambridge (The M.I.T. Press) 1968, pp. 497-507. Y1 - 1968 ER - TY - JOUR A1 - Birch, H. G. A1 - Rabinowitz, H. S. T1 - The Negative Effect of Previous Experience on Productive Thinking JF - Warson, P. C., Johnson-Laird, P. N. (Eds.): Thinking and Reasoning, Harmondsworth (Penguin Books) 1968, pp. 44-50. Y1 - 1968 ER -