<https://lufthansaflyer.boardingarea.com/today-in-lufthansa-history-april-19-1972/#webpage>
<http://schema.org/name>
"Today In Lufthansa History - April 19, 1972 - Lufthansa Flyer"
<https://lufthansaflyer.boardingarea.com/today-in-lufthansa-history-april-19-1972/>