@article{das1967,
  author  = {Das, A. K.},
  journal = {Bulletin of the Cultural Research Institute},
  key     = {Das (1967)},
  number  = {i-ii},
  pages   = {5-9},
  title   = {Scientific Analysis of "Santal" Social System},
  volume  = {6},
  year    = {1967}
}