Changes

| date=August 15, 2014

| date=August 15, 2014

| accessdate=April 3, 2017

| accessdate=April 3, 2017

}}</ref> and a collection of over 170,000 photographic plates.<ref>[http://astro.uchicago.edu/yerkes/plates/plates.html Observatory website]</ref>  

}}</ref> It has a collection of over 170,000 photographic plates.<ref>[http://astro.uchicago.edu/yerkes/plates/plates.html Observatory website]</ref>  

==References==

==References==

<references/>

<references/>

[[Category:Wisconsin]]

[[Category:Wisconsin]]

[[Category:Astronomy]]

[[Category:Astronomy]]