TY  - JOUR
A1  - Heckathorn, D.D.
T1  - Respondent-driven sampling II: Deriving valid population estimates from chain-referral samples of hidden populations
Y1  - 2002
DO  - 1525/sp.2002.49.1.11
JF  - Social Problems 
VL  - 49
IS  - 1
SP  - 11
EP  - -34

ER  -