External link Conversion Calculator for Units of MASS (& Weight) (http://www.ex.ac.uk/cimt/dictunit/ccmass.htm)
... world by volume, the Parana[?] with its impressive Iguaçu[?] falls, the Rio Negro, São Francisco[?], Xingu, Madeira and the Tapajós[?] rivers. Situated along the equator, ...