TY  - BOOK
AU  - Pledge, H.T.
TI  - Science since 1500: a short history of mathematics, physics, chemistry, biology
U1  - 509 
PY  - 1939///
CY  - London
PB  - Majesty's Stationery Office
KW  - Mathematics
KW  - Science - History
KW  - Chemistry
KW  - Ecology; Astronomy
ER  -