Philippine Rock Industries, Incorporated grinding rock becomes a successful business venture
| מחבר ראשי: | |
|---|---|
| פורמט: | ספר | 
| שפה: | English | 
| יצא לאור: | [New York]
          American Universities Field Staff
    
        c1968. | 
| סדרה: | American Universities Field Staff. Southeast Asia series
              v. 16, no. 8 | 
| נושאים: |