Campbell and Campbell 1987

Campbell, Carl and Campbell, Jody. 1987. Yade Grammar Essentials. (unpublished).

@unpublished{Campbell-and-Campbell-1987,
  author     = {Campbell, Carl and Campbell, Jody},
  school     = {Summer Institute of Linguistics},
  title      = {Yade Grammar Essentials},
  type       = {manuscript},
  year       = {1987},
  iso_code   = {nce},
  olac_field = {general_linguistics; syntax; morphology; typology; semantics},
  wals_code  = {nag}
}