Steigerwald. Experimenting at the Boundaries of Life. University of Pittsburgh Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSteigerwald. Experimenting at the Boundaries of Life. University of Pittsburgh Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSteigerwald. Experimenting at the Boundaries of Life. University of Pittsburgh Press.
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