Regionalverkehr Mittelland

Regionalverkehr Mittelland AG (RM) was a 1997 merger of[http://zefix.admin.ch/zfx-cgi/hrform.cgi/hraPage?alle_eintr=on&pers_sort=original&pers_num=0&language=4&col_width=366&amt=007 The commercial registers in Switzerland (include former versions/cancelled names)]

• EBT - Emmental–Burgdorf–Thun-Bahn
• VHB - Vereinigte Huttwil-Bahnen
• SMB - Solothurn–Münster-Bahn

which had been under common management since 1943.Otto Schuppli: Die Vereinigten Huttwil-Bahnen. [6], Minirex, Luzern 1989, {{ISBN|3-907014-03-0}}, Seite 68

In 2006, the main owners of RM and BLS Lötschbergbahn, the canton of Bern and the Swiss Confederation merged the two companies, forming the new BLS AG.Werner Weber, Jürg Suter: Solothurn–Münster-Bahn. Die Linie Solothurn–Moutier der BLS AG. Band 322, Prellbock Druck & Verlag, Leissigen 2008, {{ISBN|978-3-907579-28-2}}, Seite 65