<h1>Hultgren, Ralph Raymond</h1>
<h2>Article from <a href="https://data.caltech.edu">CaltechTHESIS</a></h2>
<ul>
<li>Hultgren, Ralph Raymond (1933) <a href="https://resolver.caltech.edu/CaltechTHESIS:02012017-150349623">I. The Spark-in-Flame Method of Spectrographic Analysis. II. Equivalent Chemical Bonds Formed by s, p and d Eigenfunctions. III. The Crystal Structure of Sulvanite</a>; <a href="https://doi.org/10.7907/2PRM-8Q37">10.7907/2PRM-8Q37</a></li>
</ul>