Update to 1998 buyer's guide: new companies, EMS statistics. The silver book.
D000552:Ambulances / Q000706:statistics & numerical data; D002379:Catalogs, Commercial as Topic; D003625:Data Collection; D004631:Emergency Medical Service Communication Systems / Q000706:statistics & numerical data; D004632:Emergency Medical Services / Q000191:economics / Q000706:statistics & numerical data; D004864:Equipment and Supplies; D012456:Salaries and Fringe Benefits / Q000706:statistics & numerical data; D014481:United States