ウォータールー地方空港
↑ FAA Airport Form 5010 for ALO (PDF) , effective 2007-12-20
↑ Delta changes will bring upgrades to Waterloo air service, WCF Courier, July 17, 2011, Retrieved January 15, 2012
↑ http://wcfcourier.com/news/local/dot-selects-american-airlines-over-delta-for-waterloo/article_05ffbbd6-21e6-11e1-9c36-0019bb2963f4.html