IndexesDownload |
| Date | Update description |
| 2011-07-14 | Merged in "mean lifetime, τ " (M03781) |
| 2008-06-20 | Item was updated using a new definition from an updated source. |
| 2006-09-29 | Taken from the original Gold Book, published in version 1.0.0 of the XML Gold Book. |
| File | Revision | Date |
| L03515.xml | 16 | 2011-08-03T12:20:06 |