Roys 1957

Roys, Ralph L. 1957. The Political Geography of the Yucatan Maya. Washington D. C.: Carnegie Institution of Washington.

@book{roys1957,
  address   = {Washington D. C.},
  author    = {Roys, Ralph L.},
  key       = {Roys (1957)},
  publisher = {Carnegie Institution of Washington},
  title     = {The Political Geography of the Yucatan Maya},
  year      = {1957}
}