1.   Doctors are trying to locate the source of the infection.

2.   He began turning his head from side to side as he ran, to locate the source of the unknown danger.

3.   I turned to locate the source of the voice.

4.   The Soviets today have the capability to intercept and locate the sources of United States communications frequencies.

5.   We have located the source of your problem.

6.   The mechanic is still trying to locate the source of the problem.

7.   As of Friday, state and local health officials had not located the source of the plague that infected John Breen, an employee of a local recycling company.

8.   Because these problems are caused by leaks in the roof, the first step should be to locate the source of the roof leak and fix it.

9.   After months of unsuccessful attempts to locate the source of the holograms, Microsoft got a break when customs officials in Taipei turned up a shipment of the emblems.

10.   Factory managers located another source on their side of the border, but the land belonged to a collective farm.