TY  - BOOK
AU  - Cull, R G  .
AU  - Drake,W A  .
TI  - Concepts of science, Vol 1 / 
SN  - 0  85226  525  5
U1  - 500 
PY  - 1969///
CY  - New Delhi : 
PB  - Wiley Eastern Ltd , 
ER  -