In Upjohn days, paper phone books were still the norm. In the 1980s we got a new phone book every summer and winter. Here are three phone books, one from January 1977 (thank you David Westman), one from 1974 in the collection of Carol Orris and one from Summer 1985. Selected pages have been scanned. Note the good advice on telephone courtesy in the 1985 issue. I removed all the actual phone numbers from the pages to prevent any unwanted calls to the current owners of the extensions.