@article{146947,
      author = {Silverman, Irving,},
      url = {http://library.usi.edu/record/146947},
      title = {The supply of concepts /},
      publisher = {Praeger,},
      recid = {146947},
      pages = {xv, 182 p. ;},
      address = {New York :},
      year = {1989},
}