<h1>Villagrana, Robert E.</h1>
<h2>Article from <a href="https://authors.library.caltech.edu">CaltechAUTHORS</a></h2>
<ul>
<li>Lewis, Alan L. and Villagrana, Robert E. (1972) <a href="https://resolver.caltech.edu/CaltechAUTHORS:20150127-080422520">Perturbation Treatment of High-Energy-Electron Diffraction from Imperfect Crystals</a>; Physical Review B; Vol. 6; No. 12; 4382-4392; <a href="https://doi.org/10.1103/PhysRevB.6.4382">10.1103/PhysRevB.6.4382</a></li>
</ul>