4 public-domain matches

Spectrum Correction

Cover of Data, Signal and Image Processing and Applications in Sensors II

Data, Signal and Image Processing and Applications in Sensors II

Unknown author

Cover of Further Note, with a Correction, on the Spectrum of the Sun-spot of June 1889

Further Note, with a Correction, on the Spectrum of the Sun-spot of June 1889

A. L. Cortie

Cover of On the Correction of the Secondary Spectrum of Object-Glasses

On the Correction of the Secondary Spectrum of Object-Glasses

W. Wray

Cover of Correction to Paper 'On the Spectrum of Radium'

Correction to Paper 'On the Spectrum of Radium'

W. Crookes