River discharge prepared for the use of engineers and studetes / by Joh Clayton Hoyt Assoc. M. Am. Soc. C. E. engineer in charge of hydrautic computations United States Geological Survey and Nathan Clifford Grover Assoc. M. Am. Soc. C. E. assistant chef hydrographer in charge of river measurements United States Geological Survey - Hoyt, John Clayton, 1831-1912