These cards were received from Illinois, near Chicago. The lower card is artwork by Angela Gonzales, one of the first employees hired in the 1960's at Fermilab. The writer states that Angela "transformed abstract principles of atomic physics into tangible form."
According to Wikipedia, "Fermilab National Accelerator Laboratory, located just outside Batavia, Illinois, near Chicago, is a United States Department of Energy national laboratory specializing in high-energy particle physics."
