Challenge to biologists in the 70's the escalation of food production
| Auteur principal: | |
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| Format: | Livre | 
| Langue: | English | 
| Publié: | [Quezon City
          National Research Council of the Philippines
    
        1973.] | 
| Collection: | The Dr. Gregorio T. Velasquez lecture series, 1972-73 | 
| Sujets: |