@article{watson1947,
  author  = {Watson, V. D.},
  journal = {American Antiquity},
  key     = {Watson (1947)},
  number  = {2},
  pages   = {163-176},
  title   = {Ciudad Real: A Guarani-Spanish site on the alto Paraná river},
  volume  = {13},
  year    = {1947}
}