31.   The shallow drilling programme is central to the systematic survey of the continental shelf.

32.   This document is central to Florentine cultural history in the fifteenth century.

33.   This fact underscores a point that is central to any discussion of how population growth impinges on the natural environment.

34.   This raises a general question which is central to these areas, and which I shall call the representation problem.

35.   Thus the working party is arguing that information skills are not merely incidental to the curriculum but central to it.

36.   Women and the penal system Prison is still central to our system for dealing with offenders.

37.   A lot of ground has been covered in unpacking the issues central to achieving this market-led strategic change.

38.   The reform of pricing was central to the transition to a market economy.