Electret devices for air pollution control.
By: Edited by Thomas Kallard. Introductory overview: "The electret," by Bernhard Gross.
Series: State of the art review, v. 6
Publisher: Optosonic Press
Published: 1972
Place of publication: [New York]
Language: eng
Number of pages: 126
Subjects: Electrets -- Patents.; Pollution control equipment -- Patents.