Γράτσος, Γ. Α. (2011). Freight markets signals in a changing environment: An internal view of dynamic forces that shape the dry bulk business. Athens: I. Sideris.

Γράτσος, Γεώργιος Α. Freight Markets Signals in a Changing Environment: An Internal View of Dynamic Forces That Shape the Dry Bulk Business. Athens: I. Sideris, 2011.

Γράτσος, Γεώργιος Α. Freight Markets Signals in a Changing Environment: An Internal View of Dynamic Forces That Shape the Dry Bulk Business. Athens: I. Sideris, 2011.