1.3.3. Visible Trade/Invisible Trade 1.3.4 Direct Trade /Indirect Trade/Entrepot Trade 1.3.5 Trade by Roadway /Trade by Seaway Trade by Airway /Trade by Mail Order 1.3.6 Free-Liquidation Trade/ Barter Trade1.3.3. Visible Trade / Invisible Trade 1.3.4 Direct Trade / Indirect Trade / Entrepot Trade 1.3.5 Trade by Roadway / Trade by Seaway / Trade by Airway / Trade by Mail Order 1.3.6 Free-Liquidation Trade / Barter Trade