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Author(s): H.R. Heap ¹ and M.O. Felix ²
- Affiliations: 1: Chelmsford, UK
  2: San Carlos, USA
Source: Volume 15, Issue 5, May 1969, page 174
DOI: 10.1049/ep.1969.0167 , Print ISSN 0013-5127, Online ISSN 2053-7883

© The Institution of Electrical Engineers

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