@inbook{7b119b4aa9264c908777f111ae853bbf,
title = "δ13C of atmospheric methane. An integrated technique for constraining emission sources in urban and background air",
author = "D. Lowry and P. O'Brien and Nisbet, \{E. G.\} and Rata, \{N. D.\}",
year = "1998",
month = dec,
day = "1",
language = "English",
isbn = "9201005989",
pages = "57--67",
editor = "IAEA",
booktitle = "Isotope techniques in the study of environmental change. Proceedings of a symposium, Vienna, April 1997.",
publisher = "International Atomic Energy Agency",
}