Determination of the isotopic composition of ammonium-nitrogen at the natural abundance level from estuarine waters, David J. Velinsky, Jonathan Pennock, Jonathan H. Sharp, Luis A. Cifuentes, Marilyn L. Fogel
School of Marine Science and Ocean Engineering

Temporal and spatial variability in phytoplankton ammonium and nitrate uptake in the Delaware Estuary, Jonathan Pennock
School of Marine Science and Ocean Engineering