Welling, W. (1976). Collector's guide nineteenth-century photographs. Collier Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWelling, William. Collector's Guide Nineteenth-century Photographs. Collier Books, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWelling, William. Collector's Guide Nineteenth-century Photographs. Collier Books, 1976.
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