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Cover Hart M.D.,Smith W.W. THE PRINCIPLES OF SOUND SIGNALLING
Id: 151236
 

THE PRINCIPLES OF SOUND SIGNALLING

140 pp. (English).
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140с

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MORRIS D. HART ^

M.Sc, D.I.C., A.M.i.E.E. ^

' AND *

W. WHATELY SMITH

M.A., M.Sc.

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CONSTABLE AND COMPANY LTD. io and 12 ORANGE STREET, LONDON, W.C. z

1925