Castles and contracts.
D003098:Collective Bargaining / Q000379:methods*; D003431:Cross-Cultural Comparison; D006801:Humans; D007494:Ireland; D008824:Michigan; D009740:Nursing Staff / Q000458:organization & administration*; D012456:Salaries and Fringe Benefits / Q000331:legislation & jurisprudence; D012956:Societies, Nursing; D013317:Strikes, Employee