W. M. Lewis

Energy sources for aquatic animals in the Orinoco River floodplain: evidence from stable isotopes

S. K. Hamilton, S. Hamilton, W. Lewis, 1992, Oecologia.

Basin morphology in relation to chemical and ecological characteristics of lakes on the Orinoco River floodplain, Venezuela

S. K. Hamilton, S. Hamilton, W. Lewis, 1990, Archiv für Hydrobiologie.