The offshore service vessel register.
H. Clarkson & Company.
Clarkson Research Studies Limited.
London : H. Clarkson & Company,
1977-2001.
Accompanied 2001- by computer laser optical disc with title: Clarkson register CD.
Compiled and published by: Clarkson Research Studies Limited, -
Offshore support vessels
ShipStatS register of offshore supply vessels
Offshore vessel register