1. Demetriades,S.T. "Magnetogasdynamic acceleration of flowing gases and applications," Northrop Corp./Norair Div., Hawthorne, Calif., NB-59-153 (March23,1959); also Armed Services Tech. Info. Agency Doc. 229-672,U.S. Dept. of Commerce, Office of Tech.Services PB-158-510, pp.47-49(1959).
2. von Engel, A., Ionized Gases (Oxford University Press, Oxford, England, 1955) pp.4-24.