Commerce, Justice, science, and related agencies appropriations for fiscal year 2020 : hearings before a subcommittee of the Committee on Appropriations, United States Senate, One Hundred Sixteenth Congress, first session, on H.R. 3055/S. 2584, an act making appropriations for the Departments of Commerce and Justice, and science, and related agencies for the fiscal year ending September 30, 2020, and for other purposes