1936-1939 -- Refugees -- Education -- Soviet Union1
1936-1939 -- Refugees -- Soviet Union -- Social conditions1
Agriculture -- Capital productivity -- New York (State) -- History -- 19th century1
Agriculture -- New York (State) -- History -- 19th century1
American History1
Communist education -- Soviet Union1
Crop science -- New York (State) -- History -- 19th century1
Economics -- Agriculture and Natural Resources1
Economics -- History1
Environmental History1
History of Science1
Refugee children -- Education -- Soviet Union1
Refugee children -- Soviet Union -- Social conditions1
Refugee children -- Spain -- Social conditions1
Spain -- History -- Civil War1
hispanic studies -- hispanic history1
history -- slavic history1