Suomen ulkomaisen meriliikenteen lyhytaikaiset vaihtelut 1960-luvun lopulla tarkasteltuna erityisesti Kotkan ja Haminan satamien liikenteen avulla : Short term variations in shipping between Finland and foreign countries in the late 60's by cargo groups, especially in the light of the traffic in the two biggest Finnish export ports, Kotka and Hamina
Suomen ulkomaisen meriliikenteen lyhytaikaiset vaihtelut 1960-luvun lopulla tarkasteltuna erityisesti Kotkan ja Haminan satamien liikenteen avulla : Short term variations in shipping between Finland and foreign countries in the late 60's by cargo groups, especially in the light of the traffic in the two biggest Finnish export ports, Kotka and Hamina
Suomen ulkomaisen meriliikenteen lyhytaikaiset vaihtelut 1960-luvun lopulla tarkasteltuna erityisesti Kotkan ja Haminan satamien liikenteen avulla : Short term variations in shipping between Finland and foreign countries in the late 60's by cargo groups, especially in the light of the traffic in the two biggest Finnish export ports, Kotka and Hamina
Suomen ulkomaisen meriliikenteen lyhytaikaiset vaihtelut 1960-luvun lopulla tarkasteltuna erityisesti Kotkan ja Haminan satamien liikenteen avulla : Short term variations in shipping between Finland and foreign countries in the late 60's by cargo groups, especially in the light of the traffic in the two biggest Finnish export ports, Kotka and Hamina
