| Risk management and evidence based medicine are keystones of clinical governance. |
| The keystones of the arches bear inscriptions indicating their precise location within the structure. |
| The building's exterior is largely unchanged, except that the carved mammal heads on the keystones of the first floor windows have been removed. |
| They can also question peers and learn how asking for and giving assistance to one another are keystones to academic success. |
| It is only after close study that apparent solecisms can be interpreted as the keystones of a highly conscious literary construct. |
| We must be careful, however, not to paint a picture of historical evidence that suggests that newspapers are the keystones of such documentation. |
