The information could be invaluable if a giant comet ever threatened the Earth.
Certainly, Holinshed's work was an invaluable source for poets and dramatists at this time.
Few will agree with every opinion expressed by the Civic Trust, but we can all agree that its work is invaluable .
Coast Watchers and their indigenous helpers also organized an invaluable rescue service.
Mr Crump says the help he has received from Macmillan nurses is invaluable .
We know from talking to companies that an experienced executive would be invaluable in this situation.
The work was then put on video and stored as an invaluable source of reference.
Thanks to the New England Journal of Medicine for this invaluable information.
The thought of him will always be to us an invaluable source of encouragement and fortitude.
Cars can be rented locally, but if you want to get the most out of any experience, the services of a guide are invaluable .