TY  - BOOK
AU  - Schraven,Thomas
TI  - Folliott Gray's invention "The Duo Electric clock"
PY  - 1997///
CY  - Frefeld, Germany
PB  - The author
KW  - Gray, Folliott.
KW  - Clocks and watches, Electric
KW  - Clock (general)
KW  - UnitedKingdom
KW  - Grey
KW  - electric
KW  - Schraven, Thomas
KW  - ElectricalScience
N1  - "Lecture given on the 5th anniversary of the Cologne Clock Society 31/5/1997."
ER  -