Is this new? I can't find previous version of this page on Internet archive and the page footer did not get updated since 2013 (at least it suggests that the content updated last time in 2013)

> Copyright © 1963-1965, 2006, 2013 by the California Institute of Technology, Michael A. Gottlieb and Rudolf Pfeiffer

Edit: It seems that I'm wrong. There is mention that they updated Original Course Handouts in 2022

> 6. Updated in March 2022 with a new presentation featuring deep-zoomable images.