Nachelo v borbata za tekhnicheski progres
Subtitle: iubi leen sbornik : 25 godini Institut za izobreteniia i ratsionalizatsii
By: [red. Vera Gʹoreva]
Publisher: Profizdat
Published: 1973
Place of publication: Sofiia
Language: bul
Number of pages: 68
Notes: At head of title: Institut za izobreteniia i ratsionalizatsii.