Federal motor vehicle safety standard no. 121--air brake systems
Subtitle: hearings before the Subcommittee on Governmental Efficiency and the District of Columbia of the Committee on Governmental Affairs, United States Senate, Ninety-fifth Congress, first-   session ....
Publisher: U.S. Print. Off.
Published: 1978
Place of publication: Washington
Language: eng
Subjects: Air-brakes.; Motor vehicles -- Brakes.
Notes: Hearings held Dec. 6, 1977-