1
Academic Journal
Superior Title: Journal of Political Economy, 1908 Nov 01. 16(9), 622-628.
Access URL: https://www.jstor.org/stable/1820914
2
Academic Journal
Superior Title: Journal of Political Economy, 1907 Dec 01. 15(10), 624-634.
Access URL: https://www.jstor.org/stable/1820426