They are thought to be protected by language in the national contract, according to one senior union official.

The strike is a battle for a national contract, better wages and a share in royalties.

The national contract has had many successes and there is a danger these could be threatened by fragmentation.

But Soviet leaders, the authors contend, have never lived up to this national contract.

The two will hold talks on a new national contract next year.

The staffing firm may have a national contract with the worksite company.

McBride was unable to negotiate strong national contracts for his members.

But the same narrow loyalties prevent a national social contract.

The national contracts are also likely to increase the number of temps.

Such a work stoppage is permitted under the union's national contract.