A catalogue of Mars craters by Lagain et al. (2020), extending the previous
catalogue from Robbins and Hynek (2012, DOI:10.1029/2011JE003966). 185 craters
were added by Lagain, the object IDs are compatible with the previous work.
Reference: "Impact cratering rate consistency test from ages of layered ejecta on Mars",
Lagain et al., Planetary and Space Science, v.180. (2020)
DOI: 10.1016/j.pss.2019.104755
