@article {2009, title = {Stable carbon and nitrogen isotopic compositions of organic compound classes in high molecular weight dissolved organic matter from four U. S. estuaries}, journal = {Geochimica et Cosmochimica Acta}, volume = {68}, year = {2004}, note = {id: 515}, month = {2004}, pages = {2681-2691}, author = {Wang, X. C. and Altabet, A. M. and Callahan, J. and Chen, R. F.} }