00597nam a22001937a 4500003000600000005001700006008004100023082001100064100002600075243003400101245006500135260004100200300000900241440004400250500004700294650003400341942001300375999001500388MWNLS20101124160520.0101124t        xxu||||| |||| 00| 0 eng d  a380.59  aGeorge H. Borts973211 aJournal of  political economy10aIncreasing returns in the railway industry/cGeorge H. Borts  bJournal of  political economy,c1954  bill,  aJournal of  political economyv6297322  aIncreasing returns in the railway industry  aeconomyvtransportation97323  2ddccREF  c3046d3046