Fischel, W. J. (1964). William Popper (1874-1963) and his contribution to islamic scholarship: In memoriam / by Walter J. Fischel.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFischel, Walter J. William Popper (1874-1963) and His Contribution to Islamic Scholarship: In Memoriam / by Walter J. Fischel. 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFischel, Walter J. William Popper (1874-1963) and His Contribution to Islamic Scholarship: In Memoriam / by Walter J. Fischel. 1964.
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