https://www.issuelab.org/resources/45640/45640.pdf
https://www.issuelab.org/resources/45451/45451.pdf
https://www.issuelab.org/resources/45488/45488.pdf
https://www.issuelab.org/resources/45502/45502.pdf
https://www.issuelab.org/resources/45690/45690.pdf
https://www.issuelab.org/resources/45721/45721.pdf
https://www.issuelab.org/resources/45737/45737.pdf
https://www.issuelab.org/resources/45915/45915.pdf
https://www.issuelab.org/resources/45929/45929.pdf
https://www.shc-forum.com/viewtopic.php?f=13&t=280892
https://www.shc-forum.com/viewtopic.php?f=13&t=280931
https://www.shc-forum.com/viewtopic.php?f=13&t=281651
https://www.issuelab.org/resources/45469/45469.pdf
https://www.issuelab.org/resources/45652/45652.pdf
https://www.buzzfeed.com/deltaairlines_customersupport
https://www.buzzfeed.com/delta_customerservicenumber
https://www.buzzfeed.com/deltaairlinescustomer_care
https://www.buzzfeed.com/deltaairlinestollfree_number
https://www.buzzfeed.com/american_customer_service_usa
https://www.buzzfeed.com/american_airlinescustomer_care