Marine ammonium-oxidizing bacteria in seawater were enumerated by means of immunofluorescent assays developed for Nitrosococcus oceanus and Nitrosomonas marina. Samples were collected from the coastal waters off the states of Washington and California, from the central North Atlantic and northeast Pacific Oceans, and from Chesapeake Bay....
Ward, B. B.. 1982. "Oceanic distribution of ammonium-oxidizing bacteria determined by immunofluorescent assay." Journal of Marine Research 40, (4). https://elischolar.library.yale.edu/journal_of_marine_research/1623