Ionospheric research at Huancayo Observatory, Peru, January, 1938-June, 1946.
| Erakunde egilea: | |
|---|---|
| Formatua: | Liburua | 
| Hizkuntza: | English | 
| Argitaratua: | Washington, D.C.
          Carnegie Institution of Washington Publication
    
        1947 | 
| Erakunde egilea: | |
|---|---|
| Formatua: | Liburua | 
| Hizkuntza: | English | 
| Argitaratua: | Washington, D.C.
          Carnegie Institution of Washington Publication
    
        1947 |