Narŭchnik na mladii͡a novator
By: [avtori I͡U. Vŭrbanov, P. Kopandanov].
Publisher: Dŭrzh. kom-t za nauka i tekhn. progres, In-t za izobretenii͡a i rat͡sionalizat͡sii
Published: 1982
Place of publication: Sofii͡a
Language: bul
Number of pages: 127