TY  - BOOK
AU  - Childs,W.H.J.
TI  - Physical constants,: selected for students,
U1  - 530.83 
PY  - 1954///
CY  - London
PB  - Methuen, 
KW  - FÍSICA
KW  - TABLAS
N1  - "First published in 1934."
ER  -