Gregory, T. C. (1939). Uses and applications of chemicals and related materials: A guide to their current industrial uses; potential applications and sales possibilities of 5167 products. Reinhold Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGregory, Thomas C. Uses and Applications of Chemicals and Related Materials: A Guide to Their Current Industrial Uses; Potential Applications and Sales Possibilities of 5167 Products. New York: Reinhold Publishing, 1939.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGregory, Thomas C. Uses and Applications of Chemicals and Related Materials: A Guide to Their Current Industrial Uses; Potential Applications and Sales Possibilities of 5167 Products. Reinhold Publishing, 1939.
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