"2". "119-27". "1991-01-15". "114". . . . . "Source: Freebase - The World's database". "The safety and immunogenicity of a human immunodeficiency virus type 1 (HIV-1) recombinant gp160 candidate vaccine in humans. NIAID AIDS Vaccine Clinical Trials Network."@en. . . . . . . . . . . . . . . . . .