In fact, his plays are the main source of information about him.

The river was also the city's main source of drinking water.

Financial services are the main source of income to the island.

It is the main source of energy used by the body.

It is the main source for this body of music.

It is also a main source of fish for the local people.

The black market is now the main source of food, the study found.

As he came from a very poor family, his art was the family's main source of income.

It is the main source of the state's economic development.