TY  - BOOK
AU  - Bigner, Jerry J  .
TI  - Human development: a life span approach / 
SN  - 0-02-309510-4
U1  - SN1 
PY  - 1983///
CY  - New York : 
PB  - Macmillan Publishing Company , 
KW  - Human development-Life span
ER  -