World Customs Organization (WCO) 
- Independent intergovernmental body whose mission is to improve the administration of customs. History, structure, activities, and member countries.
CEP Customs Broker Inc. - Offers services to import merchandise into the U.S. including food, tobacco, clothing and machinery. Includes FAQ and contact details.
Cleared and Delivered - Online discount custom house brokerage site providing import customs clearance and delivery.
Harbour Shipping - Customs clearance agent based in Dover UK
Leon Marais Customs Consultancy - Independent customs consultant describes clients, services and contact details.
MCL Associates - Customs and tariff advisers based in Warwickshire, UK.
