Columbia subject headings:
Harvard subject headings:
Argentina--History--Revolution, 1955.
Communists--Argentina--Biography.
Disappeared persons--Argentina--Biography.
Ingallinella, Juan, 1912-1955.
Massacres--Argentina--Buenos Aires--History--20th century.
Perón, Juan Domingo, 1895-1974--Assassination attempt, 1955.
Physicians--Argentina--Biography
Plaza de Mayo (Buenos Aires, Argentina)
Political activists--Argentina--Biography.
Princeton subject headings:
Communists--Argentina.
Ingallinella, Juan, 1912-1955.