TY - BOOK AU - Stouthamer-Loeber,Magda AU - Van Kammen,Welmoet Bok TI - Data collection and management: a practical guide T2 - Applied social research methods series SN - 0803956568 U1 - 300.72 20 PY - 1995/// CY - Thousand Oaks, Calif PB - Sage ER -