Subagjo, Hardjosubroto <br/><br/>
Volcanic ash influence and characterization of soils on the eastern plain of the Barisan Range between Sitiung Kota Baru and Bangko, Sumatra  [microform] / 
Hardjosubroto Subagjo 
 - Ann Arbor, Mich. :  University Microfilms International ,  1989 
 - 4 microfiches ;  11 x 15 cm. 
<br/><br/>Thesis (Ph.D.) - North Carolina State University, 1988 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Volcanic ash, tuff, etc.--Indonesia<br/>Soils--Indonesia