TY  - BOOK
AU  - Aron,Raymond
AU  - Lengyel,Peter
TI  - Approaches to the science of socio-economic development
U1  - 301.44 
PY  - 1971///
CY  - Paris
PB  - Unesco
KW  - Economic development
KW  - Social aspects
N1  - Includes bibliographical references
ER  -