(NfILOSOFIQ OPTIMIZMA (B/s - (NkUZNECOW(B, (NbORIS gRIGORXEWI^s; (NaKADEMIQ NAUK sssrs ((NmOSKWA (B:s (NnAUKA(B,s, 1972)
Keywords: (NnAUKAs