Original paper
The paleozoic seed Mitrospermum in American coal balls
Taylor, Thomas N.;Stewart, Wilson N.
Palaeontographica Abteilung B Band 115 Lieferung 1-3 (1964), p. 51 - 58
published: Dec 22, 1964
Keywords
seeds, Palaeozoic • Mitrospermum • coal, balls • USA