 | Some series have
a volume and number. For example: |
| |
| | L 2.41/2:29/6 | Employment
and Earnings, volume 29, number 6 | |
| Some series have
"Cutter numbers." |
| Unnumbered publications
have a book number, called a Cutter, based on a coding system using the key word
in the title. For example: |
| |
| | NAS 1.2:G 14 | Implications
of the IRAS Data for Galactic Gamma-Ray Astronomy and EGRET | |
| Here, the Cutter
number is based on the title keyword, gamma ray. |
| GPO differentiates
a completely different title with the same keyword by using /2. For example: |
| |
| | NAS 1.2:G 14/2
| Gamma-Ray Astronomy in the Compton Era |
|
