(NtRIGONOMETRIQ DLQ MA[INOSTROITELEJ I \LEKTROTEHNIKOW (B/ s - (NgESS(B, (NaDOLXFs; (NbUNICKIJ(B, (Ne(B.(Nl(B.s ([(NoDESSA(B] :s (NgOS(B. (NIZD(B-(NWO uKRAINY(B,s, 1923)
Keywords: (NtRIGONOMETRIQs