Gilbrich, W.H. <br/><br/>
50 Years of hydro(geo)logical mapping activities /  
W.H. Gilbrich [and] W.F. Struckmeier 
 - Paris :  UNESCO,  2014. 
 - 79 p.:  ill. 
<br/><br/>  includes annex 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology