AU  - Chattopadhyay, Paresh 
ED  - Symposium Action rresearch and scientific analysis= Investigación activa y análisis científico (Cartagena, Colombia. Abril 18-23, 1977) 
TI  - Political economy or "critique" of political economy?: on some aspects of the relation between theory and practice 
CY  - Cartagena : 
PB  - A.I.S. 
ER  -