Direction of trade statistics : yearbook - International Monetary Fund (Washington, D.C. : International Monetary Fund, 1981)
PTSL : 1987-93, 1996, 1997, 2000, 2001, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Covers events of the previous seven years, e.g. vol. for 1992 covers 1987-93, etc.
Keywords: Commercial statistics -- Periodicals