TY  - BOOK
AU  - Lengyel,Peter
AU  - Aron,Raymond
TI  - Approaches to the science of socio-economic development,
AV  - HD82 .L36
PY  - 1971///
CY  - Paris
PB  - Unesco
KW  - Economic development
KW  - Social aspects
KW  - Addresses, essays, lectures
N1  - Includes bibliographical references
ER  -