TY - JOUR A1 - Gong, L. A1 - Lewicki, R. A1 - Griffin, R. J. A1 - Flynn, J. H. A1 - Lefer, B. L. A1 - Tittel, F. K. T1 - Atmospheric ammonia measurements in Houston, TX using an external-cavity quantum cascade laser-based sensor JO - Atmos. Chem. Phys. J1 - ACP VL - 11 IS - 18 SP - 9721 EP - 9733 Y1 - 2011/09/20 PB - Copernicus Publications SN - 1680-7324 UR - http://www.atmos-chem-phys.net/11/9721/2011/ L1 - http://www.atmos-chem-phys.net/11/9721/2011/acp-11-9721-2011.pdf DO - 10.5194/acp-11-9721-2011 ER -