Milner-Gulland, E. J., & Mace, R. Conservation of biological resources.
Dyfyniad Arddull ChicagoMilner-Gulland, E J., and Ruth Mace. Conservation of Biological Resources.
Dyfyniad MLAMilner-Gulland, E J., and Ruth Mace. Conservation of Biological Resources.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.