$美国石绵(USG)$ 8-K - Current report Filed: 2016-05-12 AccNo: 0000757011-16-000183 Size: 130 KBItem 3.03: Material Modifications to Rights of Security HoldersItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangemen 网页链接