Letter symbols for acoustics
By: Prepared by Sectional Committee on Letter Symbols.
Contributors: American Society of Mechanical Engineers.
Series: ASA Y10.11-1953. UDC OO3.62:534. Reaffirmed, 1959; Y series (American Standards Association) -- Y10.11-1959.
Publisher: American Society of Mechanical Engineers
Published: 1959
Place of publication: New York
Language: eng
Number of pages: 11
Subjects: Architectural acoustics -- Notation
Notes: Cover title.

"This standard is ... approved as either a USA Standard or as an American Standard.  It became an American National Standard in Oct. 1969 when the institute changed its name to American National Standard Institute, Inc" ̲̲ Label mounted on cover.