21.   Mayhem persisted throughout the day, official sources said.

22.   No official source confirmed that.

23.   Official Serb sources reported that one Serbian police officer had been killed, and two injured.

24.   Press reports in Japan this month quoted unnamed official sources as saying that a lack of money would delay the start of construction by three years.

25.   Random mayhem persisted throughout the day, official sources said.

26.   That reliance on a few official sources of intelligence has created huge gaps in American knowledge of Saudi affairs, including the extent of political opposition.

27.   The memories and lessons passed down from generation to generation often offer an alternative history to the official written sources.

28.   The papers dealing with Father Feeney come from official Chancery sources, Johnson-Lally said, and are housed in a collection that is currently closed to researchers.

29.   The official source for the U.S. Department of Defense and standard time for the United States.

30.   They drew on data from official sources, government authorities, and the air forces of other countries.