Ionospheric research at Huancayo Observatory, Peru, January, 1938-June, 1946.
| Institution som forfatter: | |
|---|---|
| Format: | Bog | 
| Sprog: | English | 
| Udgivet: | Washington, D.C.
          Carnegie Institution of Washington Publication
    
        1947 | 
| Institution som forfatter: | |
|---|---|
| Format: | Bog | 
| Sprog: | English | 
| Udgivet: | Washington, D.C.
          Carnegie Institution of Washington Publication
    
        1947 |