00612nam a2200193Ia 450000500170000000800460001703700110006304000200007404100130009408400240010710000250013124500600015626000090021630000100022554600350023594200220027099900210029295201050031320250508163337.0008  250505s9999    xx            000 0 eng d  aTheses  aFEDLbengcFEDL  aeng2eng  a510.7, GUP/THqFEDL  aGupta Ramesh Chandra 0aBackwardness in mathematics and basic arithmetic skills  c1971  a304p.  aPH.D Thesis (Delhi University)  cTHh510.7, GUP/TH  c1382450d1382450  00104070aFEDLbFEDLd2025-05-08l0o510.7, GUP/THpEL0075774r2025-05-08 16:33:37w2025-05-08yTH