51.   Kindergarten aides joined the strike last week, and drivers of the Belgrade municipal transport company announced they would hold a warning strike for back pay on Monday.

52.   Kindergarten aides joined the strike last week, and drivers of the Belgrade municipal transport company said they would hold a warning strike for back pay on Monday.

53.   Mass transit workers in Baden-Wuerttemberg and Lower Saxony, two other states, also staged warning strikes.

54.   Meanwhile, city gardeners in Mainz and female police officers in Ludwigshafen in Rhineland-Palatinate state staged warning strikes.

55.   Miners in southern Poland held a warning strike Monday to protest pension reforms and vote on whether to call a general strike.

56.   Other countries, like Sweden, consider strikes only as a last resort, while in nations like France a warning strike is a common occurrence.

57.   On Monday, railway engineers held a similar warning strike for similar demands.

58.   Retail employees continued warning strikes Tuesday as a full-strike vote got underway, with union and employer negotiators blaming each other for the deadlock.

59.   Public schools and the Lebanese University were closed Tuesday because of a warning strike staged by the teachers in protest.

60.   Public transportation in Munich was paralyzed during rush-hour by a warning strike.