It does not directly affect this particular project, but I think it would be a most useful study to undertake.

The few useful studies that exist usually include factors that might be peculiar to one country, or society.

Some of these issues were explored in a useful international study by Kramer (1981).

These are widely considered some of the most useful and pioneering studies on the subject.

He now spent four years at home in studies useful to a traveller.

Any useful study of the rich must end up with the here and now.

Unfortunately, there is not much more that will be available for useful study from this period.

This is a highly selected guide to the most useful studies.

It has been a fascinating and very useful study.

Why has such a useful study drawn so little interest?