(N~ISLO I NAUKA O NEM(B. (NoB]EDOSTUPNYE O^ERKI PO ARIFMETIKE NATURALXNYH ^ISELs - (NbERMAN(B,(Ng(B. (Nn(B.s (NgEORGIJ nIKOLAEWI^s ((Nm(B.s (NgOSTEHTEORIZDATs, 1954)