Chapman, Robert D.
Discovering astronomy
W.H. Freeman, 1978
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Jefferys, William H.
Discovering astronomy
John Wiley & Sons, 1981
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Hutton, Wendy
Discovering Sabah
Opus Publications Sdn Bhd, 2007
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Yohana Nessy Christiana
Discovering myselft
PT Gramedia, 2022
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Kularatna, Nihal
Electronic circuit design : from concept to implementation
CRC Press, Taylor & Francis Group, 2008
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