00621nam a2200205Ia 450000100060000000300050000600500170001100800410002801000200006904000180008905000210010708200120012810000310014024500840017126000390025530000110029465000440030565000340034965000320038320729BIBL20180417022325.0680301s1958    nyu      b    00010 eng    a 91050146 //r90  aDLCcDLCdDLC00aLB1607b.R5 195800a373.1/310aRisk, Thomas Marion2Local10aPrinciples and practices of teaching in secondary schoolsc[by] Thomas M. Risk.0 aNew YorkbAmerican Book Co.c1958.  a526 p. 0aEducationxExperimental methods.2Local 0aEducational psychology2Local 0aEducation, Secondary2Local