11.   Firefighters had a difficult time locating the source and were forced to use a lot of water or foam.

12.   If these offerings do not include two-season trees, ask your nursery to locate sources during the coming months for early spring planting.

13.   In scientific inquiry, a statistician can locate sources of bias and error and try to correct for them.

14.   Locating these sources was intense, painstaking work that spanned two eras of information retrieval.

15.   New triangulation technology may soon allow wireless service providers to locate the source of any call.

16.   The authors located sources who said that Gore was given a safe position in Vietnam.

17.   There is even a Scholarship Interview that can help locate sources of money for higher education.

18.   They disappeared several months ago, and I would appreciate it if you could locate a source.

19.   They also want instruments that can locate geothermal sources, which could maintain liquid water nearer the frigid Martian surface.

20.   They apparently located the source by tracing a telephone line.