Lewis, H. Advanced Software and Control for Astronomy. SPIE Digital Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLewis, Hilton. Advanced Software and Control for Astronomy. SPIE Digital Library.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLewis, Hilton. Advanced Software and Control for Astronomy. SPIE Digital Library.
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