TY  - BOOK
AU  - Pledge, Humphry Thomas
TI  - ... Scince since 1500: a short history of mathmatics, physics, c hemistry and biology 
U1  - 509 PLE 
PY  - 1947///
CY  - London
PB  - H. M. Stationery office
KW  - Science
KW  - History
N1  - At head of title: Ministry of Education.Science  Museum; Includes bibliographical references (p.326-329)
ER  -