Maclay, T. Space Environmental, Legal, and Safety Issues. SPIE Digital Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMaclay, Timothy. Space Environmental, Legal, and Safety Issues. SPIE Digital Library.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMaclay, Timothy. Space Environmental, Legal, and Safety Issues. SPIE Digital Library.
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