(NiZBRANNYE PEDAGOGI^ESKIE SO^INENIQ(B.s (NKN(B. 4s - (NbUNAKOW(B,(Nn(B. (Nf(B.s ((Nm(B.s (NiZD(B-(NWO aKADEMII PEDAGOGI^ESKIH NAUK rsfsrs, 1953)