Vial, J. L. (1966). Variation in altitudinal populations of the salamander, Bolitoglossa subpalmata, on the Cerro de la Muerte, Costa Rica.
Dyfyniad Arddull ChicagoVial, James L. Variation in Altitudinal Populations of the Salamander, Bolitoglossa Subpalmata, On the Cerro De La Muerte, Costa Rica. 1966.
Dyfyniad MLAVial, James L. Variation in Altitudinal Populations of the Salamander, Bolitoglossa Subpalmata, On the Cerro De La Muerte, Costa Rica. 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.