Vilaboa ArronizJ.; Quirós MadrigalO.; Díaz RiveraP.; WingChing-JonesR.; Brower KeatingN.; Zetina CórdobaP. Livestocks systems with tropical dairy creolle (Reyna) in Costa Rica. Agronomía Mesoamericana, v. 23, n. 1, p. 167-178, 11.