Pioneri na devetata petiletka
By: Zapri͡an Grozdanov.
Contributors: Bŭlgarski profesionalni sŭi͡uzi. Okrŭzhen sŭvet (Plovdiv, Bulgaria)
Publisher: Okrŭzhen sŭvet na bŭlgarskite profesionalni sŭi͡uzi
Published: 1979
Place of publication: Plovdiv
Language: bul
Number of pages: 20
Subjects: Working class -- Bulgaria -- Plovdiv (Okrŭg); Socialist competition.