- Author: George E. Butterworth (auth.) Paul van Geert Leendert P. Mos William J. Baker (eds.)
- Language: English
- Year: 1994
- Author: Paul van Geert (auth.) Paul Van Geert Leendert P. Mos (eds.)
- Language: English
- Year: 1991
- Author: Paul Van Geert (Eds.)
- Year: 1986