Philippine Rock Industries, Incorporated grinding rock becomes a successful business venture
| Huvudupphovsman: | |
|---|---|
| Materialtyp: | Bok | 
| Språk: | English | 
| Publicerad: | [New York]
          American Universities Field Staff
    
        c1968. | 
| Serie: | American Universities Field Staff. Southeast Asia series
              v. 16, no. 8 | 
| Ämnen: |