Norman, J. H. (1893). A ready reckoner of the world's foreign and colonial exchanges: With the aid of less than 2000 figures ... New York: G.P. Putnam's Sons.

Norman, John Henry. A Ready Reckoner of the World's Foreign and Colonial Exchanges: With the Aid of Less Than 2000 Figures ... New York: G.P. Putnam's Sons, 1893.

Norman, John Henry. A Ready Reckoner of the World's Foreign and Colonial Exchanges: With the Aid of Less Than 2000 Figures ... New York: G.P. Putnam's Sons, 1893.