Open Universityearth's Physical Resources Course Team & Open University, E. P. (1974). Implications. Open university press.
Dyfyniad Arddull ChicagoOpen Universityearth's Physical Resources Course Team and Earth's Physic Open University. Implications. Open university press, 1974.
Dyfyniad MLAOpen Universityearth's Physical Resources Course Team and Earth's Physic Open University. Implications. Open university press, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.