On the theory and practice of voice identification. Bolt, R. H; Cooper, F. S; Green, D. M; Hamlet, S. L; McNight, J. G; Pickett, J. M; Tosi, O. I; and Underwood, B. D National Academy of Sciences, Washington, DC.
bibtex   
@book{bolt_theory_1979,
	Address = {Washington, DC},
	Author = {Bolt, Richard H and Cooper, Franklin S and Green, David M and Hamlet, Sandra L and McNight, John G and Pickett, James M and Tosi, Oscar I and Underwood, Barbara D},
	Date = {1979},
	Date-Modified = {2016-09-22 20:24:11 +0000},
	Isbn = {0-309-02873-6 978-0-309-02873-8},
	Keywords = {acoustic phonetics, forensic, phonetics, spectrogram},
	Publisher = {National Academy of Sciences},
	Title = {On the theory and practice of voice identification}}
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