TY  - BOOK
AU  - Helliwell J F Ed.
TI  - Aggregate investment :  Selected readings   
T2  - Penguin Modern Economics Readings
U1  - X65.3.N7, L6 
PY  - 1976///
CY  - Harmondsworth
PB  - Penguin Education         
KW  - Investment
N1  - Penguin Educaiton
ER  -