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  1. 1
    1992 Texas school survey of substance abuse : grades 7-12 /
    by Liu, Liang Y.
    Published 1993
    Government Document Book
  2. 2
    Executive summary : 1994 Texas school survey of substance use among students, grades 4-6 /
    by Liu, Liang Y.
    Published 1995
    Government Document Book
  3. 3
    1994 Texas school survey of substance use among students : grades 7-12 /
    by Liu, Liang Y.
    Published 1995
    Government Document Book
  4. 4
    1996 Texas school survey of substance use among students, grades 4-6 /
    by Liu, Liang Y.
    Published 1997
    Government Document Book
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