http://www.americanpatrol.com/REFERENCE/PlylerVDoeSummary.html
http://www.law.cornell.edu/supct/html/historics/USSC_CR_0457_0202_ZO.html
http://www.migrationinformation.org/feature/display.cfm?ID=795
http://law2.umkc.edu/faculty/projects/ftrials/conlaw/plyler.html