Title: Zlaten vek na bŭlgarskata marka
Subtitle: poshtenski karti--dokumentat͡sii͡a za pŭrvite bŭlgarski filatelisti ot 1885 godina do krai͡a na Pŭrvata svetovna voĭna
First published: 1982
Subjects: Stamp collecting
Places: Bulgaria
LC classification: HE6204.B8 Z34 1982