The London Geographical Institute. (1940). Daily Express war map of Belgium & Holland. Philip & son.
Chicagoスタイル(17版)引用形式The London Geographical Institute. Daily Express War Map of Belgium & Holland. London: Philip & son, 1940.
MLA(8版)引用形式The London Geographical Institute. Daily Express War Map of Belgium & Holland. Philip & son, 1940.
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