TY  - JOUR
A1  - Heckathorn, D.D.
T1  - Respondent-driven sampling II: Deriving valid population estimates from chain-referral samples of hidden population
Y1  - 2002
DO  - 10.1525/sp.2002.49.1.11
JF  - Social Problems
VL  - 49
IS  - 1

ER  -