<h1>Villagrana, Robert E.</h1>
<h2>Monograph from <a href="https://authors.library.caltech.edu">CaltechAUTHORS</a></h2>
<ul>
<li>Horgen, H. M. and Villagrana, R. E., el al. (1970) <a href="https://resolver.caltech.edu/CaltechAUTHORS:20150311-081723790">Computer Enhancement of High Resolution Electron Micrographs Containing Weak Periodic Information</a></li>
<li>Horgen, H. M. and Villagrana, R. E., el al. (1969) <a href="https://resolver.caltech.edu/CaltechAUTHORS:20150305-101206985">Computer Enhancement of Weak-Beam Images</a></li>
</ul>