Studies by Cowles and Brambel (1938), Newcombe and Lang (1939), and Newcombe, Horne and Shepherd (1939) have provided information on the quantitative methods for estimating inorganic phosphorus and, also, on the vertical and horizontal distribution of this nutrient substance in the waters of the Chesapeake Bay....
Newcombe, Curtis L., and Harry F. Brust. 1940. "Variations in the phosphorus content of estuarine waters of the Chesapeake Bay near Solomons Island, Maryland." Journal of Marine Research 3, (1). https://elischolar.library.yale.edu/journal_of_marine_research/562