|
Nassichuk |
1969 |
Permian ammonoids from the Belloy Formation, northeastern British Columbia.
Geological Survey of Canada, Bulletin 182:113-122, figs.11-14, pl.13, Ottawa.
|
|
|
Plummer & Scott |
1937 |
Upper Paleozoic ammonites in Texas.
The geology of Texas, vol.3 pt.1, Bull. Texas. Univ., 3701: 1-516, fig.1-88, pl.1-41; Austin, Texas.
|