1. http://www.wigglesworthfibres.com/company/companybackgroun.html.
2. http://www.measuringworth.com/exchange.
3. http://www.landauergroup.co.uk/documents/corporate-info/history.xml?lang=en.
4. Mollan S.M. “Economic Imperialism and the Political Economy of Sudan: The Case of the Sudan Plantations Syndicate, 1899–1956,” Unpublished PhD thesis, Durham University, 2008.
5. Consortia Can Thrive on Close Personal Contacts in City.;von Clemm;The Times,1971