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101 0 $aeng
102   $aUS
200 1 $aLabor mobility and population in agriculture$fCenter for Agricultural and Economic Adjustment of Iowa State University
210   $aAmes, Iowa$cIowa State University Press$d1961
215   $aviii, 231 p.$d23 cm
610 0 $aLavoro agricolo
710 02$aIowa State University.$bCenter for Agricultural and Economic Adjustment$0146303
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