| original |
Algonkian |
|
Idaho |
Pflug,H.D. Organic remains of the Beltian Series of North America. |
1965 |
| original |
Precambriam |
|
Idaho |
Pflug,H.D. Organic remains of the Beltian Series of North America. |
1965 |
| original |
Precambriam |
|
Montana |
Pflug,H.D. Organic remains of the Beltian Series of North America. |
1965 |
| details |
|
|
Idaho |
Pflug,H.D. Rock-forming organisms from the Molar Tooth Limestone of the Belt Series, (Precambrian). |
1968 |
| details |
|
|
Montana |
Pflug,H.D. Rock-forming organisms from the Molar Tooth Limestone of the Belt Series, (Precambrian). |
1968 |
| details |
Late Proterozoic |
|
Montana |
Pflug,H.D. Precambrian history of the Metazoa. |
1974 |