(NmATEMATIKA (B/s - (NvIGLEWI^(B, (Na(B.(Nbs; (NgELXMAN(B, (Na(B.(Ne(B.s; (NlENINGRADSKIJ GOSUDARSTWENNYJ PEDAGOGI^ESKIJ INSTITUT IM(B. (Na(B.(Ni(B. (NgERCENAs ((NlENINGRAD (B:s (NiZD(B-(NWO lENINGR(B. (NUN(B-(NTA(B,s, 1975)
Keywords: (NmATEMATIKAs