Fletcher, Harvey
Speech and hearing.With an introduction by
H.D.Arnold.
8:o New York 1929.
[2 ed., rev.] med titel: Speech and hearing in
communication.
8:o Toronto, New York & London 1953*
(The Bell telephone laboratories series.)

112 1
Fletcher, Harvey
Speech and hearing .With an introduction by
H.D»Arnold.
8:o New York 1929.
[2 ed., rev.] med titel: Speech and hearing in
communication.
8:o Toronto, New York & London 1953.
(The Bell telephone laboratories series.)
_______________________T_________________________