Ground-water studies; an international guide for research and practice. 
Edited by R.H. Brown [and others] 
 - Paris,  Unesco  [1972] 
 - Studies and reports in hydrology, 7 .
<br/><br/> To be kept up to date by supplements.  Loose leaf in binder, a contribution to the International Hydrological Decade. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Groundwater.<br/>Hydrology.