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Sound Insulation of Wall, Floor, and Door Constructions
From Abstract: "The data obtained at the National Bureau of Standards on the sound insulating properties of building structures are summarized. A brief description of the sound-measuring techniques is given."
Date:
November 30, 1964
Creator:
Berendt, Raymond D. & Winzer, George E.
System:
The UNT Digital Library
Calculation of Sunrise and Sunset Times at Ionospheric Heights Along a Great Circle Path
Formulas, computer program, and illustrations for a great circle path at ionospheric heights.
Date:
November 8, 1964
Creator:
Brady, A. H. & Crombie, D. D.
System:
The UNT Digital Library