TY  - CHAP
A1  - Kahn, R.L.
A1  - Antonucci, T.C. 
T1  - Convoys over the life course: Attachment, roles and social support
Y1  - 1980
A3  - Baltes, P.B.
A3  - Brim, O. 
T2  - Life-span development and behavior
CY  - New York
PB  - Academic Press

ER  -