National Geographic : 1959 Nov
Man's Electric Slaves Analyze Census Data With Lightning Speed il Census takers record data on work sheets such as this one, which describes the mythical Doe family. On the top line the enumerator lists the head of the house hold. Next he jots down the other family members and fills in circles to show their relationship, sex, race, age, and marital status. Every fourth family gets a detailed questionnaire for return by mail.