Investigation of lunar soil's electrical properties (by Luna-20) as a function of frequency and of specific weight Rzhevskii, V. V. ; Golovkin, A. R. ; Dukhovskoi, E. A. ; Petrochenkov, R. G. ; Silin, A. A. ; Shvarev, V. V. Abstract Publication: Soviet Physics Doklady Pub Date: April 1975 Bibcode: 1975SPhD...19..621R