. . . . . "Changes in the population of persons with autism and pervasive developmental disorders in California's developmental services system : 1987 through 1998 : a report to the Legislature, March 1, 1999"@en . . . "Statistics"@en . "Changes in the population of persons with autism and pervasive developmental disorders in California's Developmental Services system 1987 through 1998 : a report to the Legislature, March 1, 1999"@en . . . . . . .