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Are you Ken M. Harrison, author of the books below?
Astronomical Spectroscopy for Amateurs by Ken M. Harrison Grating Spectroscopes and How to Use Them by Ken M. Harrison Imaging Sunlight Using a Digital Spectroheliograph by Ken M. Harrison By Ken M. Harrison - Grating Spectroscopes and How to Use The... by Ken M. Harrison Astronomical Spectroscopy for Amateurs by Ken M. Harrison Imaging Sunlight Using a Digital Spectroheliograph by Ken M. Harrison Grating Spectroscopes and How to Use Them by Ken M. Harrison


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