https://pressbooks.pub/infantnamechange/chapter/do-infants-need-a-ticket-to-fly-on-american/
https://pressbooks.pub/infantnamechange/chapter/can-i-upgrade-my-seat-with-an-infant-on-american-airlines-2/
https://pressbooks.pub/travelplan/chapter/can-you-add-a-baby-to-your-ticket-klm-after-booking-first-class/
https://pressbooks.pub/travelplan/chapter/klm-airlines-policies-for-infants-on-domestic-and-international-flights/
https://pressbooks.pub/travelplan/chapter/what-to-know-about-traveling-with-an-infant-in-klm-airlines-first-class/
https://pressbooks.pub/travelplan/chapter/booking-a-minor-on-klm-airlines-rules-for-premium-cabins/