Library at Base 12, Gagarin StreetTel. +359 2 8717195, ext. 202Elena Semerdjievalibrary@ecolab.bas.bgLibrary at Base 2Tzar Osvoboditel 1, BulevardTel. +359 2 9885115, ext. 700ailieva@abv.bgLibrary at Base 3Acad. G. Bonchev Street, Block 23Tel. +359 2 9792195Maria Hristovamatinian@bio.bas.bg Central library of BASNALIS Union Catalogue – a national catalogue of the academic libraries in BulgariaOn-line resources of the library of BAS