Analysis of information sources in references of the Wikipedia article "Joslins" in English language version.
. . . plans were soon announced that the Colorado Building would be remodeled into a financial and office building. According to a 31 October 1979 Boulder Daily Camera article, the Boulder Joslin's location was due to close 31 January 1980 because of difficulty finding a new location.
Joslin's moved out of JCRS in the late 1970s and its space became the Casa Bonita restaurant.