00693nam a2200193Ia 450000500170000000800460001703700110006304000200007404100130009408400250010710000170013224501380014926000090028730000150029654600380031194200230034999900210037295201060039320250508155852.0008  250505s9999    xx            000 0 eng d  aTheses  aFEDLbengcFEDL  aeng2eng  a370.15, GUP/THqFEDL  aGupta Nirmal 0aStudy of some variables related to students, teachers and instructional material having their bearing on learning outcomes in biology  c1975  axiii,194p.  aPh. D. Thesis, (Delhi University)  cTHh370.15, GUP/TH  c1359734d1359734  00104070aFEDLbFEDLd2025-05-08l0o370.15, GUP/THpEL0045192r2025-05-08 15:58:52w2025-05-08yTH