Implement 'back' button
Implement 'back' button

bluebirrd/nau-timetable,bluebirrd/nau-timetable,bluebirrrrd/nau-timetable,bluebirrrrd/nau-timetable,bluebirrd/nau-timetable,bluebirrrrd/nau-timetable,bluebirrd/nau-timetable,bluebirrrrd/nau-timetable