https://collaboratory.gse.upenn.edu/sites/default/files/webform/Contact-Methods-Qatar-Airways-Customer-Service-Number-An-All-inclusive-Guide.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/Contact-Methods-British-Airways-Customer-Service-Number-An-All-inclusive-Guide.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/Contact-Methods-Air-France-Customer-Service-Number-An-All-inclusive-Guide.pdf