21.   At one point, a cellular telephone rang beneath the wreckage, sending people digging frantically with their hands to locate its source.

22.   At one point, a cell phone rang beneath wreckage, sending people digging frantically with their hands to try to locate its source.

23.   At one point, a cell phone rang beneath wreckage, sending bystanders digging frantically with their hands to try to locate its source.

24.   But investigators are so far unable to locate a source of the bacteria striking tourists and natives alike.

25.   He admitted that locating the source of the rumours had been a difficult process but declined to say how the trader was caught.

26.   In view of this, he said, the Geological Survey Department had undertaken satellite imagery and aerial photograph studies to locate potential sources all over the country.

27.   Remember, these covers are important so the IWK guys can locate the source of any sewerage problem.

28.   Scientists say they might have located the source of migraine headaches, a finding that suggests a new target for drugs to stop the excruciating attacks.

29.   The spokesman said health inspectors had so far been unable to locate the source of the vegetables, although they came most likely from the mainland.

30.   We need to locate the source of the problem in the global economic system that is emerging in the new world order of today.