TY  - BOOK
AU  - Ramakumar,R..
AU  - Gopal,Y.S..
TI  - Technical demography / 
SN  - 0852267436
U1  - 304.6 
PY  - 1986///
CY  - New Delhi : 
PB  - Wiley Eastern , 
KW  - DEMOGRAPHY
N1  - Includes index
ER  -