The Population question.
| Formatua: | Liburua | 
|---|---|
| Hizkuntza: | English | 
| Argitaratua: | [Manila
          Center for Research and Communication]
    
        [1974]. | 
| Gaiak: | 
| Formatua: | Liburua | 
|---|---|
| Hizkuntza: | English | 
| Argitaratua: | [Manila
          Center for Research and Communication]
    
        [1974]. | 
| Gaiak: |