http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bibliotečno-informacionno obslužvane, sociologičeski proučvaniâ : tematičen sbornik 1981
library information services, sociological studies : collected papers 1981
B''lgarska Akademiâ na Naukite. Central'na Biblioteka
otgovoren redaktor: E. Savova ; redaktor: M. Argirova.