While searching the Internet I came across an online and downloadable PDF file of:
Nordyke, M.D., 1961. Proceedings of the Geophysical Laboratory-Lawrence Radiation Laboratory Cratering Symposium (No. UCRL6438PT12). LLNL (Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)). The PDF file is at: https://www.osti.gov/scitech/biblio/1122567 https://www.osti.gov/scitech/servlets/purl/1122567 Although old, I thought that people on this list might appreciate it. Yours, Paul h.
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