<div class="description">
<p>Journal of Research of the National Bureau of Standards
</p>
<br>Subjects: [OI]5577; auroral zone; subauroral zone; Fritz Peak; Colorado; Thule; Greenland; zenith intensity; visual threshold</div>
<div class="fn value">
<dl><dd>Roach, F.E.</dd>
<dd>McCaulley, J.W.</dd>
<dd>Purdy, C.M.</dd></dl></div>
Internet Archive identifier