example subject heading searches:
(Political) Refugees -- [Country or region]
Women refugees -- [Country or region]
Refugee children -- [Country or region]
Immigrants -- [Country or region]
Women immigrants -- [Country or region]
Immigrant children -- [Country or region]
Exiles -- [Country or region]
[Name of war] -- Refugees
[Country of origin or destination] -- Emigration and immigration
[Nationality] -- United States, e.g. Salvadorans -- United States
[Nationality] Americans, e.g. Salvadoran Americans
Immigrants’ writings, [Language]
Exiles’ writings, [Language]