Foster, D. (1968). Aviation hail problem. World Meteorological Organization.
Dyfyniad Arddull ChicagoFoster, D.S. Aviation Hail Problem. Geneva: World Meteorological Organization, 1968.
Dyfyniad MLAFoster, D.S. Aviation Hail Problem. World Meteorological Organization, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.