Martin Fey, W. c. b. J. H. (2012). Soils of South Africa (1.). Cambridge University Press.
Dyfyniad Arddull ChicagoMartin Fey, With contributions by Jeff Hughes. Soils of South Africa. 1. Cambridge University Press, 2012.
Dyfyniad MLAMartin Fey, With contributions by Jeff Hughes. Soils of South Africa. 1. Cambridge University Press, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.