Includes 5 gov't publications from the National Bureau of Standards titled, Dependence of Sound Absorption Upon the Area and Distribution of the Absorbent Material, Architectural Acoustics, Effect of Paint on the Sound Absorption of Acoustic Materials, Wall Plaster: Its Ingredients, Preparation, and Properties, and The Certification Plan Its Significance, Scope and Application to Selected Federal Specifications and Commercial Standards; 1 ink on linen graph; 6-page revisions to federal specifications; and the correspondence from Aug. 20, 1927-Jan. 27, 1954.