https://submit.nal.usda.gov/sites/default/files/supplementary/usnaz8LVbB.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/Delta%20en%20Colombia.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/Vueling%20Telefono.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/KLM%20Espana.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/delta%20colombia.pdf
https://submit.nal.usda.gov/sites/default/files/manuscripts/Qatar%20Airways.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/delta%20mexico.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/volaris%20mexico.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/delta%20peru.pdf
https://submit.nal.usda.gov/sites/default/files/supplementary/latam%20peru.pdf