@article{391821,
      recid = {391821},
      author = {Martin, Lee R.},
      title = {Traditional fields of agricultural economics, 1940s to  1970s/},
      publisher = {Published by the University of Minnesota Press for the  American Agricultural Economics Association,},
      address = {Minneapolis :},
      pages = {xviii, 540 p. :},
      year = {1977},
      url = {http://library.usi.edu/record/391821},
}