Generate a more complex version of this sentence The 1972 - 73 season saw three new clubs in the league, 1.
Mesthi, versi sing luwih rumit saka ukara kasebut yaiku "Musim 1972 - 73 ndeleng rong klub anyar ing liga, VfB Oldenburg lan SV Meppen, kalorone dipromosikake saka Amateurliga, nalika ora ana klub sing mudhun saka Bundesliga menyang liga. "