| Title | Journal | Journal Categories | Citations | Publication Date |
|---|---|---|---|---|
| Proceedings, ACSM-ASPRS Annual Convention | 1991 | |||
| Proceedings, ACSM-ASPRS Annual Convention | 1991 | |||
| Proceedings, ACSM-ASPRS Annual Convention | 1989 | |||
| Proceedings, ACSM-ASPRS Annual Convention | 1987 | |||
| Proceedings, Autocarto London | 1986 |