They were afraid their money would drop in value, as more silver money was put into use.

VOA: special.2010.06.17

As more and more paper money was put into use, the value of the money fell.

VOA: special.2009.01.01

Twenty percent is put into a shared fund for use throughout the park system.

VOA: special.2009.09.28

The method was put into use a few years later in greenhouses.

VOA: special.2010.04.06