New-world science series
edited by John W. Ritchie
G.G. Harrap & Co.
by Edgar Nelson Transeau
G.G. Harrap 1924 New-world science series / edited by John W. Ritchie
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by Augustus P. West
World Book Company 1921, c1920 New-world science series / edited by John W. Ritchie
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G.G. Harrap & Co. 1921 New-world science series / edited by John W. Ritchie
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