amer, r. (1966). theory of interpolation. the institute of national planning.
Dyfyniad Arddull Chicagoamer, roshdy. Theory of Interpolation. cairo: the institute of national planning, 1966.
Dyfyniad MLAamer, roshdy. Theory of Interpolation. the institute of national planning, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.