TY  - BOOK
AU  - Bernal,J.D.
TI  - The extension of man: a history of physics before 1900 
SN  - 0297003704 :
U1  - 530.9 
PY  - 1972///
CY  - London
PB  - Weidenfeld And Nicolson
KW  - Physics
KW  - History
N1  - Includes bibliographical references and index
ER  -