Permian Basin Royalty Trust; "PBT" is the New York Stock Exchange ticker symbol
National Trust | National Trust for Places of Historic Interest or Natural Beauty | Amazon Basin | Wellcome Trust | Permian | Great Basin | drainage basin | National Trust for Historic Preservation | Drainage basin | royalty | National Trust of Australia | Wellcome Trust Sanger Institute | Tarim Basin | The Prince's Trust | BBC Trust | Leverhulme Trust | Congo Basin | Durrell Wildlife Conservation Trust | Devon Wildlife Trust | Basin Reserve | Moorfields Eye Hospital NHS Foundation Trust | Metropolitan Bank and Trust Company | Vienna Basin | Thuringian Basin | The Royal Marsden NHS Foundation Trust | Terrence Higgins Trust | Saccharine Trust | Prince's Trust | Pilgrim Trust | Permian High School |