In the Kidou Senshi Gundam-san series:

1) Saisho no Maki

2) Tsuki no Maki

3) Mittsume no Maki

4) Yottsume no Maki

5) Itsutsume no Maki

Starting from the 5th volume, Gundam Sousei, which has 24 chapters, is included in the tankobon.