TY  - BOOK
AU  - GULL,R.G.
AU  - DRAKE,W.A.
TI  - CONCEPTS OF SCIENCE / 
U1  - 507 
PY  - 1991///
CY  - [S.N] : 
PB  - WILLY EASTERN LIMITED ، 
KW  - SCIENCE
KW  - EARTH
KW  - LIFE, SCIENCES
ER  -