Hari Dhoj Pant
France. Conseil économique et social.
Portugal.
United States. Congress. Joint Committee on Internal Revenue Taxation.
United States. Dept. of the Treasury.
Arthur D. Little, Inc.
Portugal
Canada. Dept. of Finance.
Shiva Kumar Singh
John Farthing
India. Central Board of Excise and Customs
John Fitzgerald Due
Unknown Author
Faroe Metry
Bernard Lavallé
O. H. Brownlee
United States. Office of Internal Revenue
United States. Internal Revenue Service