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ຂໍ້ມູນຢູ່ໃນຫນ້ານີ້ທີ່ມາຈາກ ພະແນກປ້ອງກັນຄວາມ Homeland, ໄດ້ Federal Register, USCIS ແລະແຫຼ່ງຂໍ້ມູນທີ່ເຊື່ອຖືໄດ້ອື່ນໆ.