TY  - BOOK
AU  - Ellickson,Phyllis L.
AU  - Hawes,Jennifer A.
ED  - Rand Corporation.
ED  - Conrad N. Hilton Foundation.
TI  - An assessment of active versus passive methods for obtaining parental consent
T2  - A Rand Note
PY  - 1989///
CY  - California
PB  - Rand Corporation
KW  - Mail surveys
KW  - Response rate
KW  - Behavioral assessment
KW  - High school students
KW  - Drug testing
ER  -