Balbuzanov, T., Zanev, I. Modernization of the shipping route in the bulgarian section of the river Danube,
, , ISSN 0354-3285.
Balbuzanov, T., Zanev, I. .
Modernization of the shipping route in the bulgarian section of the river Danube.
: , , ISSN 0354-3285.
Balbuzanov, T., Zanev, I. ()
Modernization of the shipping route in the bulgarian section of the river Danube,
: , ISSN 0354-3285
Balbuzanov, T., & Zanev, I.
().
Modernization of the shipping route in the bulgarian section of the river Danube. // <I>Ecologica<D>, Belgarde, 23, 2016, № 82, p. 161-165.. (5419),