1. Letter from Barbara McClintock to William L. Brown Publication: Produced: 9 August 1966 Subject(s): ChromosomesZea maysMexicoCentral AmericaSouth America Archival Collection: The Barbara McClintock Papers (Profiles in Science)
2. Erradicación del la poliomelitis en las Americas Publication: Produced: [Washington, DC] : Organización Panamericana de la Salud, 1985 Subject(s): Poliomyelitis -- prevention & controlPoliomyelitis -- historyPoliovirus Vaccines -- historyDisease Eradication -- historyNorth AmericaSouth AmericaCentral America