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• Hopwood, J. M.
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  That Wonderful, Miserable Nicad Cell.
  Fire and Arson Investigator, Vol. 31, No. 2, 56-58, October/November 1979

• Hopwood, J. M.
  view article (1.0)

  Overfused Circuit--How Serious?
  Fire and Arson Investigator, Vol. 29, No. 3, 47-50, January/March 1979