TY  - RPRT
TI  - North American Paleozoic land snails, with a summary of other Paleozoic nonmarine snails
AU  - Alan Solem
AU  - Ellis Leon Yochelson
PY  - 1979
DO  - 10.3133/pp1072
UR  - https://pubs.usgs.gov/publication/pp1072
ID  - pp1072
ER  -