TY  - BOOK
AU  - Turner,Jeffrey S.
AU  - Helms,Donald B.
TI  - Life span development
SN  - 9780721689364
AV  - BF713 .T87
U1  - 155 @
PY  - 1979///
CY  - Philadelphia
PB  - Saunders
KW  - Developmental psychology
N1  - Includes indexes; Bibliography: p. 493-521
ER  -