BibTeX

@book{Nilsson1920,
  address   = {Lund},
  author    = {Nilsson, Martin P.},
  publisher = {C.W.K. Gleerup},
  title     = {Primitive time-reckoning: a study in the origins and first development of the art of counting time among the primitive and early culture peoples},
  year      = {1920},
  sections  = {None}
}