With a friend revisit Figure 8.1, types of secondary data, and reread the accompanying text in Section 8.2. Agree to find and, where possible, make copies (either electronic or photocopy) of at least two examples of secondary data for each of the seven sub-headings: LO7 a written materials, b non-written materials, c area based, d time series based, e censuses, f continuous and regular surveys, g ad hoc surveys.

Compare and contrast the different examples of secondary data you have found.