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1by Hegner, Robert William, 1880-1942### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1924New York, Macmillan, 1924.xix, 597p. illus.(part col.)maps. 20cm. -
2by Hegner, Robert William, 1880-1942### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1927New York : The Macmillan Co., 1927.xv, 175 p. : ill., col. plates. ; 20 cm. -
3by Hegner, Robert William, 1880-1942### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1930New York, The Macmillan company, 1930.ix, 532 p. illus., diagrs. 22 cm.