Four songs were performed by Tonia and the winner was chosen by postcard voting.
In February 1993 the seven songs were played on the radio, with the public invited to vote for their favourite entry by postcard voting.
Ten songs took part, with the winner chosen by postcard voting.
The winning song was chosen by postcard voting; the full ranking of the songs is known, but information on votes received is only available for the top five songs.
The winner was again chosen by postcard voting, however, this time, only the top four entries were announced.
The winning song was chosen by postcard voting.
The selection process began with six heats of six songs each, from which two songs per heat were chosen to progress by a combination of "expert" jury and postcard voting.
Brühl performed five songs and the winner was chosen by postcard voting.
In 1967, Steinmetz sung all six songs in the Dutch Eurovision selection, with "Ring-dinge-ding" being chosen by postcard voting as the winner.
Reynolds performed eight songs, with the winner chosen by postcard voting.
