Handbook on the principles of hydrology / 
 Principles of hydrology 
editor in chief Donald M. Gray. 
 - Canada :  secretariat Canadian National Committee,  1970. 
 - (various pagings). :  ill. ;  29 cm. 
<br/><br/> On spine: Principles of hydrology. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0912394072 
<br/><br/><label>LCCN: </label>74-168113 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology<br/>Hydrology--Canada