This, coupled with the trade restrictions, led to periodic shortages, rationing, and increased social unrest.

This was also an advantage due to some regions of North America having to ration available gasoline supplies due to periodic shortages at the time.

This was a goal that was largely unmet, judging by the periodic shortages of everything from fruit to furniture.

In the bumps, a periodic shortage of well-trained crews has meant Corpus is prone to yo-yo.

Such blood substitutes could help relieve periodic shortages of donated blood.

And yet, under Chavez's administration, economic output has slowed, underemployment has risen, and there have been periodic shortages of basic food items from supermarket shelves.

Because the collapse of the Argentine economy in December has meant periodic shortages of paper, no program was available for the opera's opening night.

Some baseball executives say it's a cyclical problem, no different from the periodic shortages of second basemen or shortstops or third basemen.

But the prices of some crops may be much more volatile because of periodic shortages.

That means that New Yorkers are free to water trees liberally, without fearing the kinds of periodic shortages that have occurred in past summers.