But transportation is the leading source.
France was the leading source, supplying $13 billion; the United States was second, with $8.7 billion.
Al Jazeera (//english.aljazeera.net/HomePage) is the leading source of news information for the Arab world.
The annals he wrote are the leading source for 7th- and 8th-century Byzantine history.
For several months, Bloomberg has been the leading source of online business videos, considered valuable content.
Today, with a reduction in poppy farming in Afghanistan, the United States calculates that Myanmar is the leading source.
Land grabs by corrupt officials are the leading source of public anger toward the one-party government in Vietnam.
Coal combustion is the leading source of atmospheric mercury, which also enters ecosystems by wet and dry deposition.
Not only has Venezuela often been the leading source of oil for the United States, but the country's minister of energy, Ali Rodriguez, is now OPEC president.
In the 1999 fiscal year, Russia was the leading source country, with 4,348, followed by China, with 4,101, and South Korea, with 2,008, according to the Joint Council on International Adoption Services.
