Pterospermopsidae
- Citations total:
- 2
| link
|
From
|
To
|
Geolocation
|
Author - title
|
Year
|
|---|---|---|---|---|---|
| details | Nd | Nd | McGregor,D.C. Spores and other plant microfossils from selected Devonian sedimentary Formations of Canada | 1957 | |
| details | Nd | Nd | Sarjeant,W.A.S. The Hystrichospheres. A review and discussion. | 1961 |