TY  - BOOK
AU  - Playtner,R.H.
TI  - An analysis of the lever escapement: a lecture delivered before the Canadian Watchmakers' and Retail Jewelers' Association 
PY  - 1895///
CY  - Chicago
PB  - Hazlitt
KW  - Clocks and watches
KW  - Escapements
KW  - Escapmentscie
KW  - Canada
KW  - Lever
KW  - Escapement theoretical
KW  - Watch (general)
ER  -