NASA NTRS · 19690063544
A seismic refraction system for lunar use.
Abstract
Miniaturized seismic refraction system for manned lunar landings consisting of geophones, three channel amplifier, calibrator and logarithmic compressor
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Kerr, J., Kovach, R. L., Mcallister, B. D., Watkins, J., Zimmer, J.. 1969-07-01. A seismic refraction system for lunar use.. https://ntrs.nasa.gov/citations/19690063544
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