00442nam a2200157Ia 450000500170000000800460001703700180006304000200008104100130010108400280011410000140014224500670015626000090022330000090023254600430024120250508155847.0008  250505s9999    xx            000 0 eng d  aDissertations  aFEDLbengcFEDL  aeng2eng  a371.335 2, NIG/DIqFEDL  aNigam S N 0aExperimental study of the effectiveness of instructional films  c1964  a84p.  aM. Ed. Dissertation (Delhi University)