The works can only be approximately dated, if at all, because so little is known about Master I. A. M.'s life.

Based largely on the careers of her sons, Ælfgifu's marriage has been dated approximately to the (mid-)980s.

Muller's work can be dated approximately by the appearance of his signature.

Eliseg is probably to be dated approximately to the mid-eighth century.

The building can be dated approximately as between 1430 and 1490.

All three can be approximately dated.

It is dated approximately to early 3rd century BC.

Several of the later books can be dated approximately from the events, or dates within the titles.

Genetic analysis of the Sakha population shows a botleneck dated approximately at that time, 1300 200 ybp.

The charter can be approximately dated to some point between about 705 and 717.