The Bell System Technical Journal > 1929 > 8 > 1 > 209 - 213
Source
Abstract
Identifiers
journal ISSN : | 0005-8580 |
DOI | 10.1002/j.1538-7305.1929.tb02315.x |
The Bell System Technical Journal > 1929 > 8 > 1 > 209 - 213
journal ISSN : | 0005-8580 |
DOI | 10.1002/j.1538-7305.1929.tb02315.x |