papersilove
Tuesday, March 14, 2023
Yerkes
https://www.grainger.com/know-how/inspiration/kh-yerkes-observatory-restoring-worlds-largest-refracting-telescope?gucid=N:N:AP:Paid:OB:CSM-2925:HAHJXF:20511006:APZ_1&dicbo=v4-8w14s0q-1080379056
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