https://discourse.jabref.org/t/complete-list-of-delta-airlines-support-contact-numbers-in-the-usa-the-ultimate-official-guide/7877
https://discourse.jabref.org/t/complete-list-of-qatar-airways-support-contact-numbers-in-the-usa-the-ultimate-official-guide/7891
https://discourse.jabref.org/t/complete-list-of-emirates-airlines-support-contact-numbers-in-the-usa-the-ultimate-official-guide/7903
