TY  - JOUR
A1  - Luke, N.
A1  - Clark, S.
A1  - Zulu, E.
T1  - The Relationship History Calendar: Improving the Scope and Quality of Data on Youth Sexual Behavior
Y1  - 2011
DO  - 10.1007/s13524-011-0051-2
JF  - Demography
VL  - 48

ER  -