TY  - BOOK
AU  - Frodsham,Charles
TI  - Isochronism of balance-springs
T2  - Waltham Watch papers
PY  - 2011///
CY  - Waltham, Massachusetts
PB  - Waltham Watch Company
KW  - Clocks and watches
KW  - Springs (Mechanism)
KW  - OscillationScience
KW  - Not Geographic
KW  - isichronism
KW  -    watch balancewheel advanced
KW  - Fordsham Charles
KW  - Pocket Watch
N1  - Reprint of: Waltham, Mass., 1862
ER  -