But there is still a rich source of resources to be tapped.

Facebook, on the other hand, is a rich source of pictures.

Science has always been a rich source for those ideas.

The formation is a rich source of oil, first discovered in the 1950s.

Today it is a very rich source of information and interesting reading.

It is known for its rich source of sea foods.

The radio is a rich source of news and entertainment.

In time, you will learn that he is a rich source of information.

To this day it is a rich source of inspiration for life.

He also likes business travel because it is a rich source of material.