Gyroscope

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Text Citations

TEXT CITATIONS

Gyroscope:

"Sperry's Spinning Wheel," FORTUNE, May'40, pp. 57-60, Vol. XXI, No. 5

• RBF edited.

401.05 (Gray)

1005.11 (Gray)

1009.60 (Gray) footnote

1009.80 (Gray)-1009.98 (Gray)