"Gosudarstvennai︠a︡ publichnai︠a︡ biblioteka imeni M.E. Saltykova-Shchedrina. Otdel pechatnykh bibliograficheskikh rabot." . . . . . . . "Bibliography" . . "Pavel Naumovich Berkov; k shestidesi︠a︡tiletii︠u︡ so dni︠a︡ rozhdenii︠a︡. Spisok nauchnykh pechatnykh trudov" .