Author: Šišmanov, Ivan D. Format: Book Language: Bulgarian Institution: The Swiss National Library OR Institution: National Library of Estonia OR Institution: National Library of Sweden - Kungliga biblioteket OR Institution: National and University Library, Slovenia OR Institution: Saxon State and University Library OR Institution: Bern University Library OR Institution: University Library of Regensburg OR Institution: Vienna University Library OR Institution: Library service of the University of Strasbourg OR Institution: University and Regional Library of Tyrol OR Institution: University Library in Bratislava