Rabiner, Lawrence R., Digital processing of speech signals / Lawrence R. Rabiner, Ronald W. Schafer. - Englewood Cliffs, N.J. : Prentice-Hall, c1978. - xvi, 512 p. : ill. ; 25 cm. - Prentice-Hall signal processing series . ISBN: 0132136031 Dewey Class. No.: 621.380412