@article{Ketcham, author = {Ketcham, W. A.}, title = {Problems of Measuring School Performance}, series = {N. S. Scrimshaw and J. E. Gordon (Eds.), Malnutrition, Learning, and Behavior, Cambridge (The M.I.T. Press) 1968, pp. 475-485.}, journal = {N. S. Scrimshaw and J. E. Gordon (Eds.), Malnutrition, Learning, and Behavior, Cambridge (The M.I.T. Press) 1968, pp. 475-485.}, language = {en} }