| His hundreds of sketchbooks were invaluable aide-memoire, and he kept them well organized so he could quickly locate what he wanted. |
| We present a case in which the pressure-volume curve proved invaluable in the diagnostic workup of a patient. |
| The military working dogs have been invaluable for deterring criminal activity in the newly independent country. |
| A lot of invaluable literature in the languages of the common folk has remained outside recognised literary boundaries. |
| It was an invaluable experience, though, and he passed a coaching course that qualifies him to manage a fourth division side. |
| My thanks go to Richard Holt for providing invaluable information for my work. |
