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Halvern is an unincorporated community in Alameda County, California. It is located on the Southern Pacific Railroad south-southeast of Hayward, at an elevation of 20 feet (6 m). ==References== * 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Halvern, California」の詳細全文を読む スポンサード リンク
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