HERMES: a high-resolution fibre-fed spectrograph for the Mercator telescope : Gert Raskin : Free Download, Borrow, and Streaming : Internet Archive
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Celestron - 70mm Travel Telescope - Portable Refractor Telescope - Fully Coated Glass Optic - Ideal Telescope for Beginners - PRIME Astronomy Progess : Amazon.com.be: Electronics
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