1. Axtman, K. (2000), “Border trade beset by big‐city traffic snarls”, Christian Science Monitor, Vol. 92, 20 November, p. 3.
2. Babbie, E. (1998), The Practice of Social Research, 8th ed., Wadsworth Publishing, Belmont, CA.
3. Barone, M. (2002), “South of the border”, US News and World Report, Vol. 133 No. 5, pp. 34‐5.
4. Brooks, K. (2002), “OK for Mexican big rigs stalls”, Fort Worth Star‐Telegram, 25 August, pp. B1; B6.
5. Bryce, R. (1999), “A Texas‐size tie‐up”, US News and World Report, Vol. 127, 25 October, p. 36.