Oberaargauer Schmalspurbahnen Langenthal - Jura-Bahn (LSB), Langenthal - Melchnau-Bahnen (LMB), Oberaargau - Jura-Bahnen (OSB), Solothurn - Niederbipp -Bahn (SNB) = Interurban and Narrowgauge railways between Langenthal and Solothurn (Switzerland) - Stamm, René; Jeanmaire, Claude (Verl. Eisenbahn, 1975)