TY  - BOOK
AU  - Mathur,P N 
TI  - Layers of techniques: implications of the co existence of different technologies for general economies and industrial firms 
SN  - 9788178311920
U1  - 338.52 
PY  - 2009///
CY  - New Delhi
PB  - Manak publications
KW  - Prices mathematical models
KW  - Technologicalj innovation economic aspects
N1  - includes index
ER  -