by J William Baumol | .
by Milton M Snodgrass | L.T.Wallall.
by William Henry Spiegel | .
by R Lawrence Klein | .
by Henri Theil | .
by Taro Yamane | .
by S K Ray | .
by Richard B Freeman | .
by Lloyd G Raynolds | .
by Lloyd G Reynolds | .
by Solomon Fbricant | .
by Thomas F Cargill | .
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