<div class="description">
Subjects: Radioactive substances -- Standards.; Phosphors -- Standards.</div>
<div class="fn value">
American National Standards Institute. Subcommittee N43-2</div>
<dl><dd><a rel="nofollow" class="external free" href="https://archive.org/details/americannational116amer">https://archive.org/details/americannational116amer</a></dd>
<dd><a rel="nofollow" class="external free" href="https://archive.org/download/americannational116amer/americannational116amer.pdf">https://archive.org/download/americannational116amer/americannational116amer.pdf</a></dd></dl>