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English J., Cassidy H. G., . (1961). Priniciples of organic chemistry. New York: McGraw-hill book co.INC.
English J, Cassidy H G, . 1961. Priniciples of organic chemistry. New York: McGraw-hill book co.INC.
English J, Cassidy H G, . Priniciples of organic chemistry. New York: McGraw-hill book co.INC. 1961.