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@puro_gringo @AstroMikeMerri Angell and Korshover, 1978 https://t.co/iuYX4UkI2w Schultz, 1972 https://t.co/PCU40nzZbM Nelson et al., 1975 https://t.co/vnPjaQKmQG Schneider, 1974 https://t.co/PqRSCoM2PE
@puro_gringo @AstroMikeMerri Angell and Korshover, 1978 https://t.co/iuYX4UkI2w Schultz, 1972 https://t.co/PCU40nzZbM Nelson et al., 1975 https://t.co/vnPjaQKmQG Schneider, 1974 https://t.co/PqRSCoM2PE