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Reg Spry
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Make your own telescope from everyday materials
Reg Spry · South Downs Planetarium Trust
48 sayfa · 1978
Amateur's manuals / Telescopes / Design and construction
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Yazar
1 cilt bulundu.
Reg Spry · South Downs Planetarium Trust
48 sayfa · 1978
Amateur's manuals / Telescopes / Design and construction