Beiser, A. (1959). Our earth: The properties of our planet, how they were discovered and how they came into being. New York : Dutton.
Dyfyniad Arddull ChicagoBeiser, Arthur. Our Earth: The Properties of Our Planet, How They Were Discovered and How They Came into Being. New York : Dutton, 1959.
Dyfyniad MLABeiser, Arthur. Our Earth: The Properties of Our Planet, How They Were Discovered and How They Came into Being. New York : Dutton, 1959.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.