a case history of Puerto Rico, supplemented by recent Mexican experience Jaffe, Abram J. creator Columbia University. Bureau of Applied Social Research text bibliography ilu Glencoe, Ill Free Press [1959] monographic eng 381 p. ill., charts, tables. Abram J. Jaffe. Forewarded by Charles D. Glencoe. At head of title : A report of the Bureau of Applied Social Research of Columbia University. Bibliography : p. 369-375. Labor Puerto Rico Labor Mexico Puerto Rico Economic conditions 1918- 930708 20160527185911.0 123546