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Referring work: Schaber GG et al 1974 Interagency Report 64, Lava flows in Mare imbrium: An evaluation of anomalously low earth-based radar reflectivity. USGS

2 maps

Maps per year (2 total)
1970 1974: 2 1980 1990 2000 2010 2020
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# Title Map No. Lead Author Artist Target Quad. Scale Year Publisher
#2322 Distribution of lowest levels (.074 to .090) of absolute visible albedo on the Lunar Earthside hemisphere, modified from Pohn et al. 1970 Moon 1974
#2728 Portion of Mare Imbrium showing distribution of depolarized 70 cm radar return with less than 50 percent the average power for the basin Moon 1974