Study of satellite frequency requirements for the U.S. Postal Service electronic mail system /
| Data(s) |
31/01/1974
|
|---|---|
| Resumo |
v.1 Summary -- v. 2. Frequency allocations and network designs -- v.3 Technology studies Mode of access: Internet. |
| Formato |
bib bib bib bib |
| Identificador |
http://hdl.handle.net/2027/pst.000071902074 http://hdl.handle.net/2027/pst.000071902081 |
| Idioma(s) |
eng |
| Publicador |
[Washington] : Office of Telecommunications, |
| Direitos |
Items in this record are available as Public Domain, Google-digitized. View access and use profile at http://www.hathitrust.org/access_use#pd-google. Please see individual items for rights and use statements. |
| Palavras-Chave | #Radio frequency allocation #Artificial satellites in telecommunication. #Postal service |
| Tipo |
text |
