“…The possible presence of a stabilizing lunar duricrust (Greenwood et al, 1971;Heiken and Carrier, 1971;Carrier and Heiken, 1972) (see section 9.1.4) would tend to reduce the levitation effects, but not the charge accumulations and discharge hazard. More detailed discussions of these effects are found in Criswell (1972), Fenner et al (1973, Gold and Williams (1973), Arrhenίus (1974, Alvarez (1974cAlvarez ( , 1975, Cameron (1974Cameron ( , 1978, Freeman and Ibrahim (1974), Gold (1974), Goldstein (1974), McCoy and Criswell (1974b), Williams (1974), Criswell (1974), Reasoner (1975), Criswell and De (1977), and De and Criswell (1977). Similar effects have also been suggested to exist on the surface of Mercury (Ip, 1986).…”