Lehner & Griffith

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Lehner & Griffith

Variants of the nameLehner-Griffith
Lehner and Griffith, Inc.
Source data found1. WWW A Long-Period Seismograph System, 12/09/2018 (Lehner and Griffith, Inc.) https://blogs.ei.columbia.edu//wp-content/uploads/2012/06/press-ewing-1958.pdf
2. Galvanómetro de largo periodo