Methods for assessment of fish production in fresh waters.
| Format: | Book | 
|---|---|
| Published: | 
        London
          International Biological Programme, 1968
    
        1968
     | 
| Subjects: | 
| Format: | Book | 
|---|---|
| Published: | 
        London
          International Biological Programme, 1968
    
        1968
     | 
| Subjects: |