But what sources often fail to understand is that they're only useful while they can provide information.

Only when these other sources failed did companies cut back, postpone or cancel their spending plans.

It went on forever, or until its source of power failed.

When the source failed to show up, the team members began suspecting they were under surveillance.

Several sources of evidence for a specialized speech module have failed to be supported.

All contemporary sources fail to mention Washington as adding a religious codicil to his acceptance.

When these sources failed they lived on grasshoppers, and at this season the grasshopper was their principal food.

Where do you turn when traditional sources of reassurance fail you?

Your sources failed to note that we also evaluate firms on public service, diversity and treatment of associates.

But the sources of those betrayals never failed to confound him.