@article{Sing:231904,
      author = {Sing, Kirpal and Hrabovszky, J.P.},
      title = {{An Economic Analysis of Bullock Labour Use on Delhi  Farms}},
      journal = {Indian Journal of Agricultural Economics},
      volume = {Volume 20},
      number = {Number 4},
      pages = {17. - 13},
      year = {1965},
}