Annual Report of the Smithsonian Institution for the year 1984. Washington, D.C.: Smithsonian Institution Press, 1985, p. 418.
Summary:
"Jayathu," the Asian elephant presented to President Reagan as a gift from J.R. Jayawardene of Sri Lanka, who arrived at the National Zoo on June 12, 1984, dies, apparently suffering an allergic reaction to her infant formula.