61.   A much more important source of inflation is in unit labor costs, Sorenson said.

62.   A number of large papers have placed their own classifieds on the Web, seeking to protect an important source of revenue.

63.   A sharp drop in air travel has hit tourism, an important source of foreign exchange.

64.   A. The combination of the Asian economic crisis and the oil crisis has hit Russia very hard because oil is such an important source of its earnings.

65.   Africa remains an important source, while other potential suppliers are ramping up production.

66.   All this has given airlines an important additional source of revenue.

67.   But automakers remain important sources of employment and symbols of national strength in many countries, making governments reluctant to allow their closure or sale to foreign investors.

68.   But for immigrant and minority workers, they have also been an important source of better jobs, a first step to the middle class.

69.   But it does not sink in that an important source of revenue and economic progress is the City University of New York.

70.   But that is no excuse not to make checks mandatory at gun shows, an important source of weapons for criminals and juveniles.