Bolivia held a parliamentary election on 13 March 1938, electing a new Constituent Assembly, 1938–1939.
Bolivian legislative election, 1938 Wikipedia
FSU – United Socialist Front (Frente Unión Socialista). Electoral alliance formed by Legion of Veterans (Legión de Ex-Combatientes), LEC; Confederation of Bolivian Workers (Confederación Sindical de Trabajadores de Bolivia), CSTB; Workers' Party, PO; Popular Front of Potosí, FPP; United Socialist Party, PSU; Republican Socialist Party, PRS; Independent Socialist Party, PSI.
On 27 May 1938 the Constituent Assembly confirmed President Germán Busch Becerra, who had assumed the presidency on 13 July 1936 as a result of a coup d'état.
Constituent Assembly was dissolved by President Germán Busch Becerra on 24 April 1939.