Hearing aids; an experimental study of design objectives
By: by Hallowell Davis ... [and others] ...
Contributors: Harvard University. Psycho-Acoustic Laboratory
Publisher: Harvard Univ. Press
Published: 1947
Place of publication: Cambridge, Mass
Language: eng
Number of pages: 197
Subjects: Hearing Aids
Notes: Prepared by the Psycho-Acoustic Laboratory of Harvard University.  cf. p. v.

Bibliography: p. [193]-194.