Linsley R.M. & Yochelson E.L. 1973. Devonian Carrier Shells (Euomphalidae)
from North America and Germany. Geological Survey Professional Paper, 824: 1-26, pl. 1-6.
176595
Linsley, R. M.; Yochelson, E. L.
1973
Devonian Carrier Shells (Euomphalidae
from North America and Germany