WHETSTONE, G.W. <br/><br/>
HYDROLOGIC INFORMATION SYSTEMS 

 - Geneva : UNESCO - WMO,  1972 
 - 72p ; illus. 
 - Studies and report in hydrology ; no.14 .
<br/><br/><br/>ENG 
<br/><br/><label>Subjects--Topical Terms: </label><br/>METEOROLOGICAL OBSERVATIONS.<br/>HYDROLOGICAL MEASUREMENTS.<br/>Hydrology.