As a music historian alone, he is an essential national resource.

A positive training 'climate' in the library department itself is an essential resource.

Water should be recognized as one of the planet's essential resources.

He assumes direct regulatory control over essential resources of the state.

Water is an essential resource for all life on the planet.

These programmes are essential resources for all members of the school family.

She has become an essential resource for the team and family members.

Information about activities and costs is an essential resource for improving value chain performance.

Water is an essential natural resource for life, health, food and general well-being.

Your complaint is an essential resource for local, state, and federal law enforcement officials.