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  1. ...occupation of the field" occurs, according to the Court in Pennsylvania v Nelson (1956), when there is "no room" left for state regulation. Courts...

    1 Answers · Politics & Government · 25/01/2011

  2. ..., Attorney General of Pennsylvania, Percival R. Rieder and ...119. With them on the brief were Nelson B. Seidman and Philip Z...

    2 Answers · Politics & Government · 31/01/2007

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