Bostaph, S. H. Dr. Henry William Spiegel (1911 - 1995): émigré economist, historian of economics, creative scholar, and companion. American journal of economics and sociology, 345-362.
Styl cytowania ChicagoBostaph, Samuel H. "Dr. Henry William Spiegel (1911 - 1995): émigré Economist, Historian of Economics, Creative Scholar, and Companion." American Journal of Economics and Sociology : 345-362.
Styl cytowania MLABostaph, Samuel H. "Dr. Henry William Spiegel (1911 - 1995): émigré Economist, Historian of Economics, Creative Scholar, and Companion." American Journal of Economics and Sociology, , pp. 345-362.
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