0 0 0 , 0 0 0 ▁Ge olog ic ▁Series . ▁( H ard copy ▁is ▁available ▁for ▁sale ▁from ▁U . S . ▁Ge ological ▁Survey , ▁Information ▁Services , ▁Box ▁ 2 5 2 8 6 , ▁Federal ▁Center , ▁Den ver , ▁CO ▁ 8 0 2 2 5 ) ▁ ▁References ▁ ▁Dav ies , ▁M . ▁E ., ▁and ▁Bat son , ▁R . ▁M ., ▁ 1 9 7 5 , ▁Sur face ▁coordinates ▁and ▁cart ography ▁of ▁Mercur y : ▁Journal ▁of ▁Ge oph ys ical ▁Research , ▁v . ▁ 8 0 , ▁no . ▁ 1 7 , ▁pp .   2 4 1 7 – 2 4 3 0 . ▁ ▁De ▁Hon , ▁R . ▁A ., ▁and ▁W ask om , ▁J . ▁D ., ▁ 1 9 7 6 , ▁Ge olog ic ▁structure ▁of ▁the ▁eastern ▁mare ▁bas ins : ▁L un ar ▁Science ▁Conference , ▁ 7 th , ▁Pro ceed ings , ▁pp .   2 7 2 9 – 2 7 4 6 . ▁ ▁Gree ley , ▁Ron ald , ▁and ▁G ault , ▁D . ▁E ., ▁ 1 9 7 0 , ▁P rec ision ▁size - fre quency ▁distribution ▁of ▁cr aters for ▁ 1 2 ▁selected ▁areas ▁of ▁the ▁lun ar ▁surface : ▁The ▁Moon , ▁v . ▁ 2 , ▁no . ▁ 1 , ▁pp .   1 0 – 7 7 . ▁ ▁Hol t , ▁H