Copies from papers can be obtained. Please ask: |
| Institute of Scientific Information, ISI |
| 3501 Market Street |
| Philadelphia, Pennsylvania 19104, USA |
| Phone: 1-215-386-0100, 1-800-336-4474 |
| Fax: 1-215-386-6362 |
| http://www.isinet.com/ |
| Att. Jeffrey Dougherty Sr. Manager, Publisher Relation |