Plastic Pollution in the Marine Environment: Hearing Before the National Ocean Policy Study of the Committee on Commerce, Science, and Transportation, United State Senate, One Hundredth Congress, First Session on Disposal of Plastic Wastes in the Marine Environment, July 29, 1987

Exxon oil spill: hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred First Congress, first session on Exxon Valdez oil spill and its environmental and maritime implications