Apparatus for expanding acceleration curves prior to integration. In: "Earth Motions in the Vicinity of a Fault Slip" by Nicholas Heck and Frank Neumann, 1942. Bulletin of the Geological Society of America, Vol. 53, pp. 179- 194.
Image ID: cgs00103, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection Photo Date: 1942 • High Resolution Photo Available
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