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  1.  59
    Essays on Population and Other Papers. James Alfred Field, Helen Fisher Hohman, James Bonar.Joseph J. Spengler - 1932 - International Journal of Ethics 42 (4):486-487.
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  2.  22
    Have Values a Place in Economics?Joseph J. Spengler - 1933 - International Journal of Ethics 44 (3):313.
  3.  66
    Have Values a Place in Economics?Joseph J. Spengler - 1934 - International Journal of Ethics 44 (3):313-331.