TY - JOUR A1 - Worton, D. R. A1 - Sturges, W. T. A1 - Schwander, J. A1 - Mulvaney, R. A1 - Barnola, J.-M. A1 - Chappellaz, J. T1 - 20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air JO - Atmos. Chem. Phys. J1 - ACP VL - 6 IS - 10 SP - 2847 EP - 2863 Y1 - 2006/07/12 PB - Copernicus Publications SN - 1680-7316 UR - http://www.atmos-chem-phys.net/6/2847/2006/ L1 - http://www.atmos-chem-phys.net/6/2847/2006/acp-6-2847-2006.pdf ER -