Columbia subject headings:
Harvard subject headings:
Americans--Nigeria--Biography.
Clark, Gretel--Correspondence.
Economic assistance, American--Nigeria.
Ford Foundation. International Fellowships Program--Biography.
Lagos (Nigeria)--Social life and customs--20th century.
Nigeria--History--20th century.
Nigeria--Pictorial works.
Nigeria--Politics and government--20th century.
Princeton subject headings:
Americans--Nigeria--Biography.
Clark, Gretel--Correspondence.
Clark, Peter B., 1934---Correspondence.
Economic assistance, American--Nigeria.
Ford Foundation. International Fellowships Program--Biography.
Lagos (Nigeria)--Social life and customs--20th century.
Nigeria--History--20th century--Pictorial works.
Nigeria--Politics and government--20th century.