Bibliografii︠a︡
Subtitle: D-r Ivan Velkov (1891-1958 g.), Profesor Velizar Velkov (1928-1993 g.)
By: Ivan Todorov
Edition: 1. izd
Publisher: Universitetsko izdatelstvo "Sv. sv. Kiril i Metodiĭ"
Published: 2009
Place of publication: Veliko Tŭrnovo
Language: bul
Number of pages: 151
ISBN-13: 9789545247002