author = { },

title = { Gasbeschaffenheit = Gas quality = Qualité de gaz },

publisher = {DVGW},

keywords = { Richtlinie , Gas , Qualität },

year = {2000},

booktitle = {Regelwerk : G / DVGW ; 260},

address = { Bonn },

url = { http://slubdd.de/katalog?TN_libero_mab2 }