Natural Resources and Development. 

 - Tubingen    Buchdruckerei Eugen Gobel    1999. 
 - Biannual. 
 - Vol. 2, 1975 - Vol. 51, 1999. 
<br/><br/> This is a series that presents original contributions and texts taken from scientific publications. 
<br/><br/><label>ISSN: </label>03402797 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>LC Class. No.: </label>QH540.N3