Voyager 2 flyby of Neptune microform : hearing before the Subcommittee on Space Science and Applications of the Committee on Science, Space, and Technology, U.S. House of Representatives, One Hundred First Congress, first session, October 4, 1989.
United States.Congress.House.Committee on Science, Space, and Technology.Subcommittee on Space Science and Applications.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., Congressional Sales Office, U.S. G.P.O.,
1990.
"No. 66."
Microfiche.
Project Voyager.