title: Union insignia barred: unfair labor practice.
authors.forename: A D
authors.initials: AD
authors.lastname: Tammelleo
mesh_terms: D004651:Employment; D006801:Humans; D007750:Labor Unions / Q000331:legislation & jurisprudence*; D009738:Nursing Service, Hospital / Q000458:organization & administration; D009741:Nursing Staff, Hospital / Q000331:legislation & jurisprudence*; D011647:Puerto Rico