Ionospheric research at Huancayo Observatory, Peru, January, 1938-June, 1946.
| Korporativna značnica: | |
|---|---|
| Format: | Knjiga | 
| Jezik: | English | 
| Izdano: | Washington, D.C.
          Carnegie Institution of Washington Publication
    
        1947 | 
| Korporativna značnica: | |
|---|---|
| Format: | Knjiga | 
| Jezik: | English | 
| Izdano: | Washington, D.C.
          Carnegie Institution of Washington Publication
    
        1947 |