Schmidgen. The Helmholtz Curves. Fordham University Press.
Dyfyniad Arddull ChicagoSchmidgen. The Helmholtz Curves. Fordham University Press.
Dyfyniad MLASchmidgen. The Helmholtz Curves. Fordham University Press.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.