References
- APHA, 1989: Standard Methods for the Examination of Water and Wastewater, 17th edn. — American Public Health Association, Washington, DC, 1081 pp.
- Cuthbert, I. D. & Del Giorgio, P., 1992: Toward a standard method of measuring color in freshwater. — Limnol. Oceanogr. 37 (6): 1319–1326.
- Edwards, R. T. & Meyer, J. L., 1987: Metabolism of a sub-tropical low gradient blackwater river. — Freshw. Biol. 17: 251–263.
- Gessner, F., 1964: The limnology of tropical rivers. — Verh. Internat. Verein. Limnol. 15: 1090–1091.
- Lewis, W. M. Jr., Saunders, J. F. III & Dufford, R., 1990: Suspended organisms and biological carbon flux along the lower Orinoco River. — In: Weibezahn, F. H., Alvarez, H. & Lewis, W. M. Jr. (eds.): The Orinoco River as an Ecosystem: 269–300. — Impresos Rubel CA, Caracas, Venezuela.
- Sartory, D. P. & Grobbelaar, J. U., 1984: Extraction of chlorophyll a from freshwater phytoplankton for spectrophotometric analysis. — Hydrobiologia 114: 177–187.
- Schmidt, G. W., 1976: Primary production of phytoplankton in three types of Amazonian waters. — Amazoniana 5 (4): 517–528.
- Sioli, H., 1964: General features of the limnology of Amazonia. — Verh. Internat. Verein. Limnol. 15: 1053–1058.
- SJRWMD, 1995: St. Johns River database. — St. Johns River Water Management District, Palatka, Florida, USA.