21. | | Autor: McClung, Gordon W. | |
22. | | Autor: Johnson, Peter Data Publicação: 1993 Coautor: Thomas, Barry | |
23. | | Autor: McCarville, Ronald E. | |
24. | | Autor: Ajzen, Icek Coautor: ; Driver, B.L. | |
25. | | Autor: Priest, Simon Coautor: ; Bugg, Richard | |
26. | | Autor: Crawford, Duane W. Coautor: ; Jackson, Edgar L. Resp- Sec.: Godbey, Geoffrey | |
27. | | Autor: Hanefors, Monica Coautor: ; Larsson, Lena | |
28. | | Autor: Dearden, Philip Coautor: ; Harron, Sylvia | |
29. | | Autor: Doizelet, Philippe Coautor: ; Dupeyras, Alain Gauthier, Pascal Maigniez, Pascal Mailliez, Thierry | |
30. | | Autor: Eagles, Paul F.J. | |