Sorem, Ronald Keith <br/><br/>
Origin of manganese deposits of Busuanga Island, Philippines  [microform] / 
Ronald Keith Sorem 
 - Ann Arbor, Mich. :  University Microfilms International,  1958 
 - 1 microfilm reel :  positive ;  35 mm. 
<br/><br/>Thesis (Ph.D.) - University of Wisconsin, 1958 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Manganese ores--Philippines