Simpson, Michael R. <br/><br/>
Discharge-measurement system using an aqustic doppler current profiler with applications to large rivers estuaries / 
Michel R. Simpson and Richard N. Oltmann 
 - Washington :  United States Government printing office,  2000 
 - iv, 32 p. :  ill. ;  28 cm. 
 - U.S. Geological Survey Water-Supply paper;  2395 .