Presidents of the SUI The University of Iowa 1900s
<bdi><a href="https://en.wikipedia.org/wiki/en:Samuel_Calvin_(geologist)" class="extiw" title="w:en:Samuel Calvin (geologist)"><span title="American geologist">Samuel Calvin</span></a>
</bdi>
1900/1909
<a rel="nofollow" class="external free" href="https://digital.lib.uiowa.edu/islandora/object/ui%3Aictcs_847">https://digital.lib.uiowa.edu/islandora/object/ui%3Aictcs_847</a>