Treta nat͡sionalna sreshta na nastavnit͡site v tekhnicheskoto tvorchestvo, Slŭnchev Bri͡ag, 22 maĭ 1985 g.
Publisher: T͡Sentr. Sŭvet po organizat͡sii͡a na tekhnicheskoto tvorchestvo, In-t za izobretenii͡a i rat͡sionalizat͡sii
Published: 1985
Place of publication: [Slŭnchev Bri͡ag?]
Language: bul
Number of pages: 57