abdel karim, a. i. (1964). difference equations. the institute of national planning.
Dyfyniad Arddull Chicagoabdel karim, abbas i. Difference Equations. cairo: the institute of national planning, 1964.
Dyfyniad MLAabdel karim, abbas i. Difference Equations. the institute of national planning, 1964.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.