00399nam a2200121Ia 4500008004100000040001700041082002400058100001800082245005600100260003700156300001400193650007000207190327s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta370.78bA266E  aAggarwal, J C 0aEducational researchban introductioncJ C Aggarwal  aNew DelhibArya Book Depotc1966  aiv, 260p.  aEducation-Research; Education-Philiosophy; Educational psychology