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Geographers --- Biography --- Ratzel, Friedrich, --- -929 --- Earth scientists --- Biografie. Genealogie. Heraldiek --- Ratzel, Friedrich --- Geografie --- Biography. --- Sociale en economische geografie --- Algemeen. --- 929 Biografie. Genealogie. Heraldiek --- 929 --- 929 Biography. Genealogy. Heraldry --- Biography. Genealogy. Heraldry --- Ratt︠s︡elʼ, Fridrikh, --- Razel, Friedrich, --- Ратцель, Фридрих, --- Geographers - Germany - Biography --- Ratzel, Friedrich, - 1844-1904