TY  - BOOK
AU  - Purcell,John Francis
TI  - From hand ax to laser: man's growing mastery of energy
U1  - 621.042 
PY  - 1982///
CY  - New York
PB  - Vanguard Press
KW  - Power (Mechanics)
KW  - History
KW  - Science
N1  - Includes indexes
ER  -