S pismoto--prez vekovete
By: [Ivan Vŭrbanov i Khristo Nikolchev ; redaktor Boris Georgiev].
Contributors: Nikolchev, Khristo, joint author.; Georgiev, Boris.
Series: Biblioteka Mlad filatelist
Publisher: [s.n.]
Published: 1979
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 79
Subjects: Postage stamps -- History.