Metodika na sot͡s︡ialisticheskoto sŭrevnovanie v uchebno-vŭzpitatelnite zavedenii͡a︡
By: Georgi Bizhkov, Gigo Ĭordanov, Stefan Ivanov.
Publisher: T͡S︡entr. kom-t na sŭi͡u︡za na bŭlgarski uchiteli
Published: 1982
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 201