J-GLOBAL ID:201602001602385110   Reference number:58A0000190

Basic research pays off. In fact,you can’t afford to do without it. Here’s the formula used by AT&T.

Volume: 29  Issue:Page: 31-33  Publication year: 1958 
JST Material Number: D0400A  ISSN: 0032-9754  CODEN: PRENA   Document type: Article
Country of issue: United States (USA) 
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