Since 1960, there has been a substantial expansion of economics literature in the field.

All four have announced substantial expansions which will be in place within the next year or so.

The next substantial expansion took place in the 1930s.

In 2008 the Home entered the final stretch of a $26 million capital campaign for substantial expansion and improvements.

At this time there was a substantial expansion of the number antennas.

Government planning and controls required any substantial expansion of production to be for the export market alone.

A substantial expansion of the college's facilities began around the time it joined Ferris.

The Commission proposal we will be voting on tomorrow provides for a substantial expansion of access rights.

However, the Schaumburg commercial market enjoyed substantial expansion during this period.

Henry was responsible for a substantial expansion of the royal justice system.