Bulgarian Subject Resources https://www.library.illinois.edu/slavic/spx/slavicresearchguides/subjectresources/subsourbul/bulghistbib2/ https://www.library.illinois.edu/slavic/spx/slavicresearchguides/subjectresources/subsourbul/lingbulg2/ https://www.library.illinois.edu/slavic/spx/slavicresearchguides/subjectresources/subsourbul/stoikov2/ https://www.library.illinois.edu/slavic/spx/slavicresearchguides/subjectresources/subsourbul/balan2/ https://www.library.illinois.edu/slavic/spx/slavicresearchguides/subjectresources/subsourbul/bulglitbib2/ https://www.library.illinois.edu/slavic/spx/slavicresearchguides/subjectresources/subsourbul/lingbulg2/