In the second and third issues of Albatros, Grinberg invokes pain as a key marker of the modern era.

But Zimmermann's invention was also a key marker in a less celebrated history - the history of what could be called the technology of avoidance.

Its key marker was the use of the stripes like wedding ribbons on the front bonnet.

Brent North Sea crude oil, the British grade that is a key international marker, was trading at $18.75 a barrel, up 45 cents in London.

When an author wishes to indicate a geographical or regional variety, a few key markers are again usually quite enough.

Bill Clinton has already put down key markers for a new strategy.

Ride maps are sometimes provided which show distances between key markers along the trail.

Based on this information, riders calculate what time they should be at each key marker.

Brent North Sea crude oil, the British blend that's a key international marker, had slipped 10 cents, to $20.60 a barrel.

Brent North Sea crude, a key international marker, had risen 20 cents, to $18.65 a barrel.