. "900.0"^^ . "Oker"@en . "105000.0"^^ . . "1.8e+09"^^ . . . "The Oker is a river in Lower Saxony, Germany, that has historically formed an important political boundary. It is a left tributary of the River Aller, 105 kilometres (65 mi) in length and runs in a generally northerly direction."@en . .