Although traditional books would continue to play an invaluable part in students' learning, computer discs would back up some of the more technical course literature.

And I see you as an invaluable part of that process.

The police dogs have proved an invaluable part of the force, according to the police officials.

It is an invaluable part of America's heritage.

This is an invaluable part of your preparation.

Morton's monologues are an invaluable part of American cultural history.

"You'll get due credit and promotion for the invaluable part you played in my plan."

Fakher was an invaluable part of our coverage for more than two years.

The Union has played an invaluable part in this process, in its capacity as the primary source of economic aid to the region.

They are an invaluable part of any trip for me, and I look forward to many more 'surprises' on my future travels.