Povishavane efektivnostta ot eksploatat͡s︡pi͡a︡ta na morskii͡a︡ tūrgovski flot na NRB.
Contributors: Genov, Pencho.
Edition: [ʺizsledvane]
Publisher: D"rzh. izd.
Published: 1970
Place of publication: Varna
Language: bul
Number of pages: 200
Subjects: Merchant marine -- Bulgaria.
Notes: Bibliography: p. 196-[197]
At head of title: Stefan Choraliev, Pencho ʺgenove.