N:
Natural Disasters: A Guide to Selected Resources - Science Reference Guide - A finding guide from the Library of Congress, Science Reference Services [U.S. Library of Congress (LOC)]

Nuclear Science at LBNL - Conducts basic research, at all energies, aimed at understanding the structure and interactions of nuclei and the forces of nature as manifested in nuclear matter [U.S. Department of Energy (DOE), Lawrence Berkeley National Laboratory (LBNL)]

R:
Record Group 326: Records of the Atomic Energy Commission, 1923 - 1975 - National Archives' Archival Research Catalog description for Record Group 326: Records of the Atomic Energy Commission, 1923 - 1975 [U.S. National Archives and Records Administration (NARA)]