POPULATION INQUIRIES

The 1970 census was taken principally by means of a separate questionnaire (a 91⁄21⁄2"x10 7/8" booklet) for each household, completed by the respondent.

Population inquiries 2-8 were asked for all persons. The remaining questions were asked on a sample basis: some at every fifth household (15 percent), others at every twentieth household (5 percent), and some at both (20 percent). Only data items collected for tabulation are shown here. For identification items, screening questions, and format, see bibliography item 5.

Except for questions on Spanish origin or descent, citizenship, year of immigration, vocational training completed, presence and duration of disability, and activity 5 years ago, the 1970 population items were comparable to those in 1960. All answers were designed for self-identification on the part

2. HOW IS EACH PERSON RELATED TO THE

HEAD OF THIS HOUSEHOLD?

Fill one circle.

If "Other relative of head,” also give exact relationship, for example. mother-in-law, brother, niece, grandson, etc.

If "Other not related to head," also give exact relationship, for example. partner, maid, etc

of the respondent, but the enumerator was allowed to fill in blanks by observation when this was possible. For item 4 (color or race), it was assumed that the respondent's relatives living in the unit were also of the same race unless the census taker learned otherwise. The enumerator's manual included a long list of possible written-in entries and how they were to be classified: For example, "Chicano," "La Raza," "Mexican American," "Moslem," or "Brown" were to be changed to White, while "Brown (Negro)" would be considered as Negro or Black for census purposes.

Although not specified on the questionnaire, the enumerator was instructed to limit question 25 (children ever born) to mothers who were or had been married unless a son or daughter had been listed.